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Parker O-Ring Handbook

Section IV – Static O-Ring Sealing

4.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Face Seal Glands
Design Chart 4-3 . . . . . . . . . . . . . . . . . . . . . . 4-18
4.1 Surface Finishes for Static O-Ring Seals. . . . . . . . . 4-2

Static O-Ring Sealing

Dovetail Grooves
4.2 Static Male and Female O-Ring Design . . . . . . . . . 4-2
Design Chart 4-4 . . . . . . . . . . . . . . . . . . . . . . 4-19
4.3 Face Type O-Ring Seals. . . . . . . . . . . . . . . . . . . . . . 4-2
Half Dovetail Grooves
4.4 Dovetail and Half-Dovetail Grooves . . . . . . . . . . . . 4-3 Design Chart 4-5 . . . . . . . . . . . . . . . . . . . . . . 4-20
4.5 Boss Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Static Crush Seal Grooves
4.6 Failures and Leakage . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Design Chart 4-6 . . . . . . . . . . . . . . . . . . . . . . 4-21

4.7 O-Ring Glands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Tube Fitting Boss Seals — AS5202

4.7.1 O-Ring Glands for Aerospace Design Table 4-3 . . . . . . . . . . . . . . . . . . . . . . 4-22
Hydraulic Packings and Gaskets . . . . . . . . . . . . . 4-3 Tube Fitting Boss Seals — AS4395
Design Chart 4-1 A & B . . . . . . . . . . . . . . . . . 4-4 Design Table 4-4 . . . . . . . . . . . . . . . . . . . . . . 4-23
Design Table 4-1 . . . . . . . . . . . . . . . . . . . . . . . 4-5 Design Table 4-5 . . . . . . . . . . . . . . . . . . . . . . 4-24
4.7.2 O-Ring Glands for Industrial Static Seals Vacuum Seal Glands
Design Chart 4-2 . . . . . . . . . . . . . . . . . . . . . . . 4-9 Design Chart 4-7 . . . . . . . . . . . . . . . . . . . . . . 4-25
Design Table 4-2 . . . . . . . . . . . . . . . . . . . . . . 4-10

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Phone: (859) 269-2351 • Fax: (859) 335-5128
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Static O-Ring Sealing

Static O-Ring Sealing

4.0 Introduction The need for back-up rings should be investigated for pressures
It has been said that O-rings are “the finest static seals ever de- exceeding 103.5 Bar (1500 psi) (for all seal types). If there is
veloped.” Perhaps the prime reason for this is because they are no extrusion gap, back-up rings are not required. Very high
almost human proof. No adjustment or human factor comes into pressures can be sealed without back-up rings if metal-to-metal
play when O-rings are assembled originally or used in repairs contact (practically zero clearance) of the gland parts can be
if the gland has been designed and machined properly. O-rings maintained. Instances have been reported of sealing pressures
do not require high bolting forces (torque) to seal perfectly. of 13,600 Bar (200,000 psi) with a 70 Shore A durometer O-
O-rings are versatile and save space and weight. They seal ring without back-up rings. Vibration or pressure fluctuation
over an exceptionally wide range of pressures, temperatures sometimes will produce “breathing” which requires back-up
and tolerances. Once seated, they continue to seal even though rings at average pressures below 103.5 Bar (1500 psi). When
some feel that they theoretically should not. In addition, they using silicone O-rings, the clearances given in the design charts
are economical and easy to use. Therefore, we agree that the and tables should be reduced 50%.
O-ring is “the finest static seal ever developed.” For examples of static seals, see Figure 4-1 (female gland)
and Figure 4-2 (male gland).
4.1 Surface Finish for Static O-Ring Seals
The design charts indicate a surface roughness value not to
exceed 32 micro-inches (32 rms) on the sealing surfaces for
static seals with a maximum of 16 rms recommended for O-ring
face-type gas seals. These figures are good general guidelines, Pressure
but they do not tell the whole story.
Equally important is the method used to produce the finish.
Use the system pressure Added wall support on plug seal
If the surface is produced by turning the part on a lathe, or to close clearance gap. minimizes breathing. External threads
by some other method that produces scratches and ridges that prevent O-ring damage during assembly.
follow the direction of the groove, a very rough surface will
still seal effectively. Some methods such as end milling or Figure 4-1: End Cap Seal Figure 4-2: Plug Seal
routing, however, will produce scratches that cut across the
O-ring. Even these may have a rather high roughness value
4.3 Face Type Seals
if the profile across them shows rounded “valleys” that the
rubber can readily flow into. Usually, these tool marks have Design Chart 4-3 explains how to design an O-ring seal when
sharp, deep, angular valleys that the O-ring material will the groove is cut into a flat surface. Note that when the pressure
not penetrate or fill completely. For this type of surface, the is outward, the groove outside diameter (OD) is primary, and the
recommended roughness values should not be exceeded. groove width then determines the inside diameter. Conversely,
when the pressure is inward, the groove inside diameter is
primary. This design technique minimizes movement of the
4.2 Static Male and Female O-Ring Seal Design O-ring in the groove due to pressure, thereby virtually eliminat-
Design Chart 4-2 and its accompanying Design Table 4-2 ing wear and pumping leakage. If this principle is used, groove
give one set of dimensions for static O-ring seals when the diameters larger or smaller than indicated may be used.
configuration is similar to a piston or rod application with
no motion involved. Aerospace Design Standard AS5857 is Two possible groove widths are shown in this chart, one for
shown in Design Chart 4-1 and Design Table 4-1 for aerospace liquids, and the other for vacuum and gases, the extra width
and military applications. for liquids allows for some minimal volume swell. In vacuum
applications, the narrower width allows for faster pump down
For applications requiring more than two or three percent stretch and reduces dead volume in which gas can be trapped. In seal-
on the inside diameter of the O-rings, refer to Figure 3-3 to ing a liquid that is known to cause no swelling of the O-ring
determine the effective “W” dimension for the stretched ring. elastomer, the narrower groove would be suitable.
The desired percent squeeze should be applied to this cross
section diameter. In large male gland assemblies, it may be Design Chart 4-3 is preferred over Design Chart 4-2 for static
desirable to use an O-ring one size smaller than indicated in face seals because it calls for a heavier squeeze in all but the
the design chart. The design stretch is so small in these large smallest (.070) cross-section rings, thus improving reliability
sizes, that the O-ring tends to sag out of the groove before it is at low temperatures.
assembled. Using the next smaller size simplifies assembly, but In a male or female gland design, the amount of squeeze
requires a reduced gland depth to attain the proper squeeze. required by Design Chart 4-3 is quite difficult to assemble.

4-2 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
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The 4-3 and 4-7 design charts are often used for vacuum seals. to wash excess epoxy from the surface with acetone before
See O-Ring Applications, Section III, for assistance in finding the parts are given an oven cure. This washing process may
the best rubber material and calculating the approximate leak be overdone to the point where small fissures on the surface
rate for a face type static seal used for a vacuum or a gas. are re-opened causing leakage under the seal in spite of the
epoxy impregnant. It is advisable, after the acetone bath, to
Face type seals are sometimes rectangular. In designing
paint the sealing surface with a thin film of epoxy and wipe

Static O-Ring Sealing

such a seal to receive a standard O-ring, the inside corner
off the excess before oven curing.
radii of the groove should be at least three times (ideally
six times) the cross-section diameter of the O-ring to avoid Leakage due to breathing, distortion, and incorrect machining
over-stressing the ring or causing corner creases that would requires a careful analysis of the problem and a consideration
potentially leak. of the possible alternatives to find the most economical solu-
tion. When one of these causes is suspected, however, the
4.4 Dovetail and Half-Dovetail Grooves possibility of porous metal should also be considered.
It is sometimes necessary to mount an O-ring in a face type For additional information on O-ring failures, see Section
groove in such a way that it cannot fall out. The dovetail VIII, Failure Analysis, in this handbook.
groove described in Design Charts 4-4 and 4-5 will serve this
function. This groove is difficult and expensive to machine, 4.7 O-Ring Glands
and the tolerances are especially critical. It should be used
only when it is absolutely necessary. 4.7.1 O-Ring Glands (Per SAE AS5857) for
Aerospace Hydraulic (Static and Reciprocating)
4.5 Boss Seals Packings and Gaskets
The AS568-901 through -932 O-ring sizes (Parker’s 3- series) The SAE Aerospace Standard (AS) 5857 provides stan-
are intended to be used for sealing straight thread tube fittings dardized gland (groove) design criteria and dimensions for
in a boss. Design Table 4-3 and Design Table 4-4 show the elastomeric seal glands for static applications. The glands
two standard boss designs that are used for this purpose. have been specifically designed for applications using SAE
AS568 size O-rings at pressures exceeding 1500 psi (10.3
Both of these bosses use the same O-ring, but Parker Seal MPa) utilizing one or two anti-extrusion (backup) rings and
Group recommends the Design Table 4-4 design when there applications at pressures under 1500 psi (10.3 MPa) without
is a choice. It is the newer design, and it has not been fully backup rings. The glands have been sized to provide increased
accepted yet by industry or by the military though there is squeeze as compared to AS4716 (shown in Section V) for
a military standard for it. The 4-4 dimensions provide for more effective sealing at low temperatures and low seal swell
closer tolerance control of the O-ring cavity and distort the conditions. These glands are not recommended for dynamic
O-ring less when assembled. The improved tolerance condi- use. Primary usage is for static external sealing.
tion assures much less trouble due to leakage resulting from
insufficient squeeze or extrusion when the older cavity is too The rod dimensions are the same as AS4716. The cylinder
small. The reduced distortion gives a longer life. bore dimensions are the same as AS4716 except for sizes
-001 through -011 and -104 through -113.

4.6 Failures and Leakage For additional information on SAE AS4716, see Section
V, O-Ring Glands (Per AS4716) For Aerospace Hydraulic
By far the most common type of failure in static O-ring seals
(Reciprocating) Packings And Gaskets.
is extrusion. This is relatively easy to prevent if the curves
of Figure 3-2 are used when the seal assembly (groove and
seal element) is designed. 4.7.2 O-Ring Glands for Industrial Static Seals
“Pulsing” or “pumping” leakage occasionally occurs when Design Chart 4-2 provides the basis for calculating gland
system pressure alone causes the O-ring to rotate in the groove dimensions. For standard O-ring sizes, these dimensions
and the resilience of the seal returns it to its original position. have been calculated and are listed in Design Table 4-2. The
To avoid pumping leakage, design the gland so that the normal procedures for the use of Design Table 4-2 are outlined in
position of the seal cross-section will be on the low-pressure the guide below.
side of the gland or use a narrower groove. After selecting gland dimensions, read horizontally to de-
Porous castings, eccentric grooves, out-of-tolerance parts, termine proper O-ring size number. Refer to Basic O-ring
tool marks, and distorted or breathing glands are also frequent Elastomers and O-Ring Applications, Sections II and III
contributors to static O-ring seal malfunctioning and failure. respectively, for help in the selection of the proper compound.
Remember, the effective part number for an O-ring consists
Cast housings and parts fabricated from powdered metal are of both a size number and a compound number.
commonly vacuum impregnated with an epoxy to seal minute
pores. In this impregnation process, it is standard procedure Refer to Appendix, Section X for installation information.

Parker Hannifin Corporation • O-Ring Division 4-3

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
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Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

Standard Gland Width for Zero, One, and Two Backup Rings in Inches

Gland and O-Ring Cross Gland Width G Gland Width G Gland Width G
AS568 Dash Section W Backup Ring No Backup Ring One Backup Ring Two Backup Rings
Number Min. Max. Width Max. Min. Max. Min. Max. Min. Max
001 .037 .043 -- .090 .095 -- -- -- --
Static O-Ring Sealing

002 .047 .053 -- .095 .100 -- -- -- --

003 .057 .063 -- .105 .110 -- -- -- --
004 to 007 .067 .073 .056 .115 .120 .174 .184 .230 .240
008 to 028 .067 .073 .056 .105 .110 .164 .174 .220 .230
104 to 109 .100 .106 .060 .150 .160 .210 .220 .275 .285
110 to 149 .100 .106 .060 .140 .150 .200 .210 .265 .275
210 to 247 .135 .143 .065 .185 .195 .250 .260 .320 .330
325 to 349 .205 .215 .090 .270 .280 .360 .370 .455 .465
425 to 460 .269 .281 .130 .345 .355 .475 .485 .610 .620
Design Chart 4-1 A: Gland Design, O-Ring and other Elastomeric Seals (SAE AS5857)

Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

Standard Gland Diametral Clearance Dimensions in Inches
Gland and AS568 O-Ring Cross-Section W Diametral Clearance D Max.
Dash Number Min. Max. Exterior Interior
001 .037 .043 .004 .004
002 .047 .053 .004 .004
003 .057 .063 .004 .004
004 to 012 .067 .073 .004 .004
013 to 029 .067 .073 .005 .005
104 to 109 .100 .106 .004 .004
110 to 126 .100 .106 .004 .004
127 to 129 .100 .106 .005 .006
130 to 132 .100 .106 .006 .006
133 to 140 .100 .106 .006 .007
141 to 149 .100 .106 .007 .007
210 to 222 .135 .143 .005 .005
223 to 224 .135 .143 .006 .006
225 to 227 .135 .143 .006 .007
228 to 243 .135 .143 .007 .007
244 to 245 .135 .143 .008 .007
246 to 247 .135 .143 .008 .008
325 to 327 .205 .215 .006 .006
328 to 329 .205 .215 .006 .007
330 to 345 .205 .215 .007 .007
346 to 349 .205 .215 .008 .007
425 to 438 .269 .281 .009 .009
439 to 445 .269 .281 .009 .010
446 .269 .281 .010 .010
447 to 460 .269 .281 .011 .010
Design Chart 4-1 B: Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

4-4 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
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Gland Design, O-Rings and Other Elastomeric Seals (SAE AS5857)

Standard gland dimensions in inches.

Male Gland Female Gland

Static O-Ring Sealing

D
D

F Dia. (F Min. = A Max. -2 L Max.) B Dia.

C Dia. H Dia.
A Dia. E Dia.
(E Max. = B Min. +2 L Max.)
(e)
0° to 5°
Break Corners
(Typ.)
Approx. .005 RAD.
D W W Pressure Pressure Pressure
.005
32 Typ.

W
R W
L Gland
63

P
63

Depth I.D.
32

.003 Typ.
G G G1 G2
P Groove Section W-W No One Two
Depth (Ref.)
Gland Detail Parbak Parbak Parbak
Finishes are RMS values. Ring Ring Rings

Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

Gland Piston Rod or Gland Piston Rod or
and or Cylinder Gland Rod and or Cylinder Gland Rod
AS568 Cylinder Bore Gland Sleeve Bore Gland AS568 Cylinder Bore Gland Sleeve Bore Gland
Dash OD ID OD OD ID ID Dash OD ID OD OD ID ID
No. C A F B H E No. C A F B H E
001 0.084 0.087 0.035 0.033 0.036 0.087 014 0.611 0.615 0.506 0.498 0.501 0.608
0.083 0.086 0.034 0.032 0.035 0.086 0.610 0.613 0.504 0.496 0.500 0.606
002 0.116 0.119 0.048 0.048 0.051 0.119 015 0.673 0.677 0.568 0.560 0.563 0.670
0.115 0.118 0.047 0.047 0.050 0.118 0.672 0.675 0.566 0.558 0.562 0.668
003 0.149 0.152 0.063 0.063 0.066 0.152 016 0.736 0.740 0.631 0.623 0.626 0.733
0.148 0.151 0.062 0.062 0.065 0.151 0.735 0.738 0.629 0.621 0.625 0.731
004 0.183 0.186 0.078 0.076 0.079 0.185 017 0.798 0.802 0.693 0.685 0.688 0.795
0.182 0.185 0.077 0.075 0.078 0.184 0.797 0.800 0.691 0.683 0.687 0.793
005 0.215 0.218 0.110 0.108 0.111 0.217 018 0.861 0.865 0.756 0.748 0.751 0.858
0.214 0.217 0.109 0.107 0.110 0.216 0.860 0.863 0.754 0.746 0.750 0.856
006 0.228 0.231 0.123 0.123 0.126 0.232 019 0.923 0.927 0.818 0.810 0.813 0.920
0.227 0.230 0.122 0.122 0.125 0.231 0.922 0.925 0.816 0.808 0.812 0.918
007 0.259 0.262 0.154 0.154 0.157 0.263 020 0.989 0.993 0.884 0.873 0.876 0.983
0.258 0.261 0.153 0.153 0.156 0.262 0.988 0.991 0.882 0.871 0.875 0.981
008 0.291 0.294 0.186 0.185 0.188 0.294 021 1.051 1.055 0.946 0.935 0.938 1.045
0.290 0.293 0.185 0.184 0.187 0.293 1.050 1.053 0.944 0.933 0.937 1.043
009 0.324 0.327 0.219 0.217 0.220 0.326 022 1.114 1.118 1.009 0.998 1.001 1.108
0.323 0.326 0.218 0.216 0.219 0.325 1.113 1.116 1.007 0.996 1.000 1.106
010 0.355 0.358 0.250 0.248 0.251 0.357 023 1.176 1.180 1.071 1.060 1.063 1.170
0.354 0.357 0.249 0.247 0.250 0.356 1.175 1.178 1.069 1.058 1.062 1.168
011 0.418 0.421 0.313 0.310 0.313 0.419 024 1.239 1.243 1.134 1.123 1.126 1.233
0.417 0.420 0.312 0.309 0.312 0.418 1.238 1.241 1.132 1.121 1.125 1.231
012 0.483 0.486 0.378 0.373 0.376 0.482 025 1.301 1.305 1.196 1.185 1.188 1.295
0.482 0.485 0.377 0.372 0.375 0.481 1.300 1.303 1.194 1.183 1.187 1.293
013 0.548 0.552 0.443 0.435 0.438 0.545 026 1.364 1.368 1.259 1.248 1.251 1.358
0.547 0.550 0.441 0.433 0.437 0.543 1.363 1.366 1.257 1.246 1.250 1.356
Design Table 4-1: Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

Parker Hannifin Corporation • O-Ring Division 4-5

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
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Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857) (Continued)
Gland Piston Rod or Gland Piston Rod or
and or Cylinder Gland Rod and or Cylinder Gland Rod
AS568 Cylinder Bore Gland Sleeve Bore Gland AS568 Cylinder Bore Gland Sleeve Bore Gland
Dash OD ID OD OD ID ID Dash OD ID OD OD ID ID
No. C A F B H E No. C A F B H E
Static O-Ring Sealing

027 1.426 1.430 1.321 1.310 1.313 1.420 128 1.676 1.680 1.514 1.498 1.502 1.665
1.425 1.428 1.319 1.308 1.312 1.418 1.675 1.678 1.512 1.496 1.500 1.663
028 1.489 1.493 1.384 1.373 1.376 1.483 129 1.739 1.743 1.577 1.560 1.564 1.727
1.488 1.491 1.382 1.371 1.375 1.481 1.738 1.741 1.575 1.558 1.562 1.725
029 0.284 0.287 0.121 0.123 0.126 0.289 130 1.802 1.807 1.641 1.623 1.627 1.790
0.283 0.286 0.120 0.122 0.125 0.288 1.801 1.805 1.639 1.621 1.625 1.788
104 0.284 0.287 0.121 0.123 0.126 0.289 131 1.864 1.869 1.703 1.685 1.689 1.852
0.283 0.286 0.120 0.122 0.125 0.288 1.863 1.867 1.701 1.683 1.687 1.850
105 0.315 0.318 0.152 0.154 0.157 0.320 132 1.927 1.932 1.766 1.748 1.752 1.915
0.314 0.317 0.151 0.153 0.156 0.319 1.926 1.930 1.764 1.746 1.750 1.913
106 0.347 0.350 0.184 0.185 0.188 0.351 133 1.989 1.994 1.828 1.810 1.815 1.977
0.346 0.349 0.183 0.184 0.187 0.350 1.988 1.992 1.826 1.808 1.813 1.975
107 0.380 0.383 0.217 0.217 0.220 0.383 134 2.052 2.057 1.891 1.873 1.878 2.040
0.379 0.382 0.216 0.216 0.219 0.382 2.051 2.055 1.889 1.871 1.876 2.038
108 0.412 0.415 0.249 0.248 0.251 0.414 135 2.115 2.120 1.954 1.936 1.941 2.103
0.411 0.414 0.248 0.247 0.250 0.413 2.114 2.118 1.952 1.934 1.939 2.101
109 0.475 0.478 0.312 0.310 0.313 0.476 136 2.177 2.182 2.016 1.998 2.003 2.165
0.474 0.477 0.311 0.309 0.312 0.475 2.176 2.180 2.014 1.996 2.001 2.163
110 0.539 0.543 0.377 0.373 0.376 0.540 137 2.240 2.245 2.079 2.061 2.066 2.228
0.538 0.541 0.375 0.371 0.375 0.538 2.239 2.243 2.077 2.059 2.064 2.226
111 0.602 0.606 0.440 0.435 0.438 0.602 138 2.302 2.307 2.141 2.123 2.128 2.290
0.601 0.604 0.438 0.433 0.437 0.600 2.301 2.305 2.139 2.121 2.126 2.288
112 0.666 0.670 0.504 0.498 0.501 0.665 139 2.365 2.370 2.204 2.186 2.191 2.353
0.665 0.668 0.502 0.496 0.500 0.663 2.364 2.368 2.202 2.184 2.189 2.351
113 0.732 0.736 0.570 0.560 0.563 0.727 140 2.427 2.432 2.266 2.248 2.253 2.415
0.731 0.734 0.568 0.558 0.562 0.725 2.426 2.430 2.264 2.246 2.251 2.413
114 0.798 0.802 0.636 0.623 0.626 0.790 141 2.490 2.495 2.329 2.311 2.316 2.478
0.797 0.800 0.634 0.621 0.625 0.788 2.488 2.493 2.327 2.309 2.314 2.476
115 0.861 0.865 0.699 0.685 0.688 0.852 142 2.552 2.557 2.391 2.373 2.378 2.540
0.860 0.863 0.697 0.683 0.687 0.850 2.550 2.555 2.389 2.371 2.376 2.538
116 0.923 0.927 0.761 0.748 0.751 0.915 143 2.615 2.620 2.454 2.436 2.441 2.603
0.922 0.925 0.759 0.746 0.750 0.913 2.613 2.618 2.452 2.434 2.439 2.601
117 0.989 0.993 0.827 0.810 0.813 0.977 144 2.677 2.682 2.516 2.498 2.503 2.665
0.988 0.991 0.825 0.808 0.812 0.975 2.675 2.680 2.514 2.496 2.501 2.663
118 1.051 1.055 0.889 0.873 0.876 1.040 145 2.740 2.745 2.579 2.561 2.566 2.728
1.050 1.053 0.887 0.871 0.875 1.038 2.738 2.743 2.577 2.559 2.2564 2.726
119 1.114 1.118 0.952 0.935 0.938 1.102 146 2.802 2.807 2.641 2.623 2.628 2.790
1.113 1.116 0.950 0.933 0.937 1.100 2.800 2.805 2.639 2.621 2.626 2.788
120 1.176 1.180 1.014 0.998 1.001 1.165 147 2.865 2.870 2.704 2.686 2.691 2.853
1.175 1.178 1.012 0.996 1.000 1.163 2.863 2.868 2.702 2.684 2.689 2.851
121 1.239 1.243 1.077 1.060 1.063 1.227 148 2.927 2.932 2.766 2.748 2.753 2.915
1.238 1.241 1.075 1.058 1.062 1.225 2.925 2.930 2.764 2.746 2.751 2.913
122 1.301 1.305 1.139 1.123 1.126 1.290 149 2.990 2.995 2.829 2.811 2.816 2.978
1.300 1.303 1.137 1.121 1.125 1.288 2.988 2.993 2.827 2.809 2.814 2.976
123 1.364 1.368 1.202 1.185 1.188 1.352 210 0.989 0.993 0.767 0.748 0.751 0.976
1.363 1.366 1.200 1.183 1.187 1.350 0.988 0.991 0.765 0.746 0.750 0.974
124 1.426 1.430 1.264 1.248 1.251 1.415 211 1.051 1.055 0.829 0.810 0.813 1.038
1.425 1.428 1.262 1.246 1.250 1.413 1.050 1.053 0.827 0.808 0.812 1.036
125 1.489 1.493 1.327 1.310 1.313 1.477 212 1.114 1.118 0.892 0.873 0.876 1.101
1.488 1.491 1.325 1.308 1.312 1.475 1.113 1.116 0.890 0.871 0.875 1.099
126 1.551 1.555 1.389 1.373 1.376 1.540 213 1.176 1.180 0.954 0.935 0.938 1.163
1.550 1.553 1.387 1.371 1.375 1.538 1.175 1.178 0.952 0.933 0.937 1.161
127 1.614 1.618 1.452 1.435 1.439 1.602 214 1.239 1.243 1.017 0.998 1.001 1.226
1.613 1.616 1.450 1.433 1.437 1.600 1.238 1.241 1.015 0.996 1.000 1.224
Design Table 4-1: Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

4-6 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857) (Continued)
Gland Piston Rod or Gland Piston Rod or
and or Cylinder Gland Rod and or Cylinder Gland Rod
AS568 Cylinder Bore Gland Sleeve Bore Gland AS568 Cylinder Bore Gland Sleeve Bore Gland
Dash OD ID OD OD ID ID Dash OD ID OD OD ID ID
No. C A F B H E No. C A F B H E

Static O-Ring Sealing

215 1.301 1.305 1.079 1.060 1.063 1.288 242 4.240 4.245 4.019 3.997 4.002 4.225
1.300 1.303 1.077 1.058 1.062 1.286 4.238 4.243 4.017 3.995 4.000 4.223
216 1.364 1.368 1.142 1.123 1.126 1.351 243 4.365 4.370 4.144 4.122 4.127 4.350
1.363 1.366 1.140 1.121 1.125 1.349 4.363 4.368 4.142 4.120 4.125 4.348
217 1.426 1.430 1.204 1.185 1.188 1.413 244 4.489 4.495 4.269 4.247 4.252 4.475
1.425 1.428 1.202 1.183 1.187 1.411 4.487 4.493 4.267 4.245 4.250 4.473
218 1.489 1.493 1.267 1.248 1.251 1.476 245 4.614 4.620 4.394 4.372 4.377 4.600
1.488 1.491 1.265 1.246 1.250 1.474 4.612 4.618 4.392 4.370 4.375 4.598
219 1.551 1.555 1.329 1.310 1.313 1.538 246 4.739 4.745 4.519 4.497 4.503 4.725
1.550 1.553 1.327 1.308 1.312 1.536 4.737 4.743 4.517 4.495 4.501 4.723
220 1.614 1.618 1.392 1.373 1.376 1.601 247 4.864 4.870 4.644 4.622 4.628 4.850
1.613 1.616 1.390 1.371 1.375 1.599 4.862 4.868 4.642 4.620 4.626 4.848
221 1.676 1.680 1.454 1.435 1.438 1.663 325 1.864 1.869 1.523 1.498 1.502 1.848
1.675 1.678 1.452 1.433 1.437 1.661 1.863 1.867 1.521 1.496 1.500 1.846
222 1.739 1.743 1.517 1.498 1.501 1.726 326 1.989 1.994 1.648 1.623 1.627 1.973
1.738 1.741 1.515 1.496 1.500 1.724 1.988 1.992 1.646 1.621 1.625 1.971
223 1.864 1.869 1.643 1.623 1.627 1.851 327 2.115 2.120 1.774 1.748 1.752 2.098
1.863 1.867 1.641 1.621 1.625 1.849 2.114 2.118 1.772 1.746 1.750 2.096
224 1.989 1.994 1.768 1.748 1.752 1.976 328 2.240 2.245 1.899 1.873 1.878 2.223
1.988 1.992 1.766 1.746 1.750 1.974 2.239 2.243 1.897 1.871 1.876 2.221
225 2.115 2.120 1.894 1.873 1.878 2.101 329 2.365 2.370 2.024 1.998 2.003 2.348
2.114 2.118 1.892 1.871 1.876 2.099 2.364 2.368 2.022 1.996 2.001 2.346
226 2.240 2.245 2.019 1.998 2.003 2.226 330 2.490 2.495 2.149 2.123 2.128 2.473
2.239 2.243 2.017 1.996 2.001 2.224 2.488 2.493 2.147 2.121 2.126 2.471
227 2.365 2.370 2.144 2.123 2.128 2.351 331 2.615 2.620 2.274 2.248 2.253 2.598
2.364 2.368 2.142 2.121 2.126 2.349 2.613 2.618 2.272 2.246 2.251 2.596
228 2.490 2.495 2.269 2.248 2.253 2.476 332 2.740 2.745 2.399 2.373 2.378 2.723
2.488 2.493 2.267 2.246 2.251 2.474 2.738 2.743 2.397 2.371 2.376 2.721
229 2.615 2.620 2.394 2.373 2.378 2.601 333 2.865 2.870 2.524 2.498 2.503 2.848
2.613 2.618 2.392 2.371 2.376 2.599 2.863 2.868 2.522 2.496 2.501 2.846
230 2.740 2.745 2.519 2.498 2.503 2.726 334 2.990 2.995 2.649 2.623 2.628 2.973
2.738 2.743 2.517 2.496 2.501 2.724 2.988 2.993 2.647 2.621 2.626 2.971
231 2.865 2.870 2.644 2.623 2.628 2.851 335 3.115 3.120 2.774 2.748 2.753 3.098
2.863 2.868 2.642 2.621 2.626 2.849 3.113 3.118 2.772 2.746 2.751 3.096
232 2.990 2.995 2.769 2.748 2.753 2.976 336 3.240 3.245 2.899 2.873 2.878 3.223
2.988 2.993 2.767 2.746 2.751 2.974 3.238 3.243 2.897 2.871 2.876 3.221
233 3.115 3.120 2.894 2.873 2.878 3.101 337 3.365 3.370 3.024 2.997 3.002 3.347
3.113 3.118 2.892 2.871 2.876 3.099 3.363 3.368 3.022 2.995 3.000 3.345
234 3.240 3.245 3.019 2.997 3.002 3.225 338 3.490 3.495 3.149 3.122 3.127 3.472
3.238 3.243 3.017 2.995 3.000 3.223 3.488 3.493 3.147 3.120 3.125 3.470
235 3.365 3.370 3.144 3.122 3.127 3.350 339 3.615 3.620 3.274 3.247 3.252 3.597
3.363 3.368 3.142 3.120 3.125 3.348 3.613 3.618 3.272 3.245 3.250 3.595
236 3.490 3.495 3.269 3.247 3.252 3.475 340 3.740 3.745 3.399 3.372 3.377 3.722
3.488 3.493 3.267 3.245 3.250 3.473 3.738 3.743 3.397 3.370 3.375 3.720
237 3.615 3.620 3.394 3.372 3.377 3.600 341 3.865 3.870 3.524 3.497 3.502 3.847
3.613 3.618 3.392 3.370 3.375 3.598 3.863 3.868 3.522 3.495 3.500 3.845
238 3.740 3.745 3.519 3.497 3.502 3.725 342 3.990 3.995 3.649 3.622 3.627 3.972
3.738 3.743 3.517 3.495 3.500 3.723 3.988 3.993 3.647 3.620 3.625 3.970
239 3.865 3.870 3.644 3.622 3.627 3.850 343 4.115 4.120 3.774 3.747 3.752 4.097
3.863 3.868 3.642 3.620 3.625 3.848 4.113 4.118 3.772 3.745 3.750 4.095
240 3.990 3.995 3.769 3.747 3.752 3.975 344 4.240 4.245 3.899 3.872 3.877 4.222
3.988 3.993 3.767 3.745 3.750 3.973 4.238 4.243 3.897 3.870 3.875 4.220
241 4.115 4.120 3.894 3.872 3.877 4.100 345 4.365 4.370 4.024 3.997 4.002 4.347
4.113 4.118 3.892 3.870 3.875 4.098 4.363 4.368 4.022 3.995 4.000 4.345
Design Table 4-1: Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

Parker Hannifin Corporation • O-Ring Division 4-7

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857) (Continued)
Gland Piston Rod or Gland Piston Rod or
and or Cylinder Gland Rod and or Cylinder Gland Rod
AS568 Cylinder Bore Gland Sleeve Bore Gland AS568 Cylinder Bore Gland Sleeve Bore Gland
Dash OD ID OD OD ID ID Dash OD ID OD OD ID ID
No. C A F B H E No. C A F B H E
Static O-Ring Sealing

346 4.489 4.495 4.149 4.122 4.127 4.472 441 7.470 7.477 7.019 6.997 7.004 7.459
4.487 4.493 4.147 4.120 4.125 4.470 7.468 7.474 7.016 6.994 7.001 7.456
347 4.614 4.620 4.274 4.247 4.252 4.597 442 7.720 7.727 7.269 7.247 7.254 7.709
4.612 4.618 4.272 4.245 4.250 4.595 7.718 7.724 7.266 7.244 7.251 7.706
348 4.739 4.745 4.399 4.372 4.377 4.722 443 7.970 7.977 7.519 7.497 7.504 7.959
4.737 4.743 4.397 4.370 4.375 4.720 7.968 7.974 7.516 7.494 7.501 7.956
349 4.864 4.870 4.524 4.497 4.502 4.847 444 8.220 8.227 7.769 7.747 7.754 8.209
4.862 4.868 4.522 4.495 4.500 4.845 8.218 8.224 7.766 7.744 7.751 8.206
425 4.970 4.977 4.519 4.497 4.503 4.959 445 8.470 8.477 8.019 7.997 8.004 8.459
4.968 4.974 4.516 4.494 4.501 4.956 8.468 8.474 8.016 7.994 8.001 8.456
426 5.095 5.102 4.644 4.622 4.628 5.084 446 8.970 8.977 8.519 8.497 8.504 8.959
5.093 5.099 4.641 4.619 4.626 5.081 8.967 8.974 8.516 8.494 8.501 8.956
427 5.220 5.227 4.769 4.747 4.753 5.209 447 9.470 9.478 9.020 8.997 9.004 9.460
5.218 5.224 4.766 4.744 4.751 5.206 9.467 9.474 9.017 8.994 9.001 9.456
428 5.345 5.352 4.894 4.872 4.878 5.334 448 9.970 9.978 9.520 9.497 9.504 9.960
5.343 5.349 4.891 4.869 4.876 5.331 9.967 9.974 9.517 9.494 9.501 9.956
429 5.470 5.477 5.019 4.997 5.003 5.459 449 10.470 10.478 10.020 9.997 10.004 10.460
5.468 5.474 5.016 4.994 5.001 5.456 10.467 10.474 10.017 9.994 10.001 10.456
430 5.595 5.602 5.144 5.122 5.128 5.584 450 10.970 10.978 10.520 10.497 10.504 10.960
5.593 5.599 5.141 5.119 5.126 5.581 10.967 10.974 10.517 10.494 10.501 10.956
431 5.720 5.727 5.269 5.247 5.253 5.709 451 11.470 11.478 11.020 10.997 11.004 11.460
5.718 5.724 5.266 5.244 5.251 5.706 11.467 11.474 11.017 10.994 11.001 11.456
432 5.845 5.852 5.394 5.372 5.378 5.834 452 11.970 11.978 11.520 11.497 11.504 11.960
5.843 5.849 5.391 5.369 5.376 5.831 11.967 11.974 11.517 11.494 11.501 11.956
433 5.970 5.977 5.519 5.497 5.503 5.959 453 12.470 12.478 12.020 11.997 12.004 12.460
5.968 5.974 5.516 5.494 5.501 5.956 12.467 12.474 12.017 11.994 12.001 12.456
434 6.095 6.102 5.644 5.622 5.628 6.084 454 12.970 12.978 12.520 12.497 12.504 12.960
6.093 6.099 5.641 5.619 5.626 6.081 12.967 12.974 12.517 12.494 12.501 12.956
435 6.220 6.227 5.769 5.747 5.753 6.209 455 13.470 13.478 13.020 12.997 13.004 13.460
6.218 6.224 5.766 5.744 5.751 6.206 13.467 13.474 13.017 12.994 13.001 13.456
436 6.345 6.352 5.894 5.872 5.878 6.334 456 13.970 13.978 13.520 13.497 13.504 13.960
6.343 6.349 5.891 5.869 5.876 6.331 13.967 13.974 13.517 13.494 13.501 13.956
437 6.470 6.477 6.019 5.997 6.003 6.459 457 14.470 14.478 14.020 113.997 14.004 14.460
6.468 6.474 6.016 5.994 6.001 6.456 14.467 14.474 14.0147 13.994 14.001 14.456
438 6.720 6.727 6.269 6.247 6.253 6.709 458 14.970 14.978 14.520 14.497 14.504 14.960
6.718 6.724 6.266 6.244 6.251 6.706 14.967 14.974 14.517 14.494 14.501 14.956
439 6.970 6.977 6.519 6.497 6.504 6.959 459 15.470 15.478 15.020 14.997 15.004 15.460
6.968 6.974 6.516 6.494 6.501 6.956 15.467 15.474 15.017 14.994 15.001 15.456
440 7.220 7.227 6.769 6.747 6.754 7.209 460 15.970 15.978 15.520 15.497 15.504 15.960
7.218 7.224 6.766 6.744 6.751 7.206 15.967 15.974 15.517 15.494 15.501 15.956
Design Table 4-1: Gland Design, O-Ring and Other Elastomeric Seals (SAE AS5857)

4-8 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Guide for Design Table 4-2

If Desired Dimension Select Closest Read Horizontally To Determine
is Known for Dimension in Column in Column Dimension for
B-1 Groove Dia. (male gland)
Bore Dia. male gland A C Plug Dia. (male gland)
G Groove width

Static O-Ring Sealing

A Bore Dia. (male gland)
Plug Dia. male gland C B-1 Groove (male gland)
G Groove width
A-1 Groove Dia. (female gland)
Tube OD female gland B D Throat Dia. (female gland)
G Groove width
A-1 Groove Dia. (female gland)
Throat Dia. female gland D B Tube OD (female gland)
G Groove width
Design Guide 4-2: Guide for Design Table 4-2

Industrial Static Seal Glands

Male Gland Female Gland

1/2 E
1/2 E

B-1 Dia. (B-1 Min. = A Max. -2 L Max.) B Dia.

C Dia. D Dia.
(e) A Dia. A-1 Dia.
0° to 5°
Break Corners (A-1 Max. = B Min. +2 L Max.)
(Typ.)
Approx. .005 RAD.
1/2 E W W Pressure Pressure Pressure
.005
32 Typ.

W
R W
L Gland
63

F
63

Depth I.D.
32

.003 Typ.
G G G1 G2
F Groove Section W-W No One Two
Depth (Ref.)
Gland Detail Parbak Parbak Parbak
Finishes are RMS values. Ring Ring Rings
Refer to Design Chart 4-2 (below) and Design Table 4-2 for dimensions metric conversion 32√ = .8√

Industrial O-Ring Static Seal Glands

G - Groove Width
O-Ring W E(a) No One Two R Max.
2-Size Cross-Section L Gland Squeeze Diametral Parbak Parbak Parbak Groove Eccentricity
AS568B- Nominal Actual Depth Actual % Clearance Ring (G) Ring (G1) Ring (G2) Radius (b)
004 .050 .015 22 .002 .093 .138 .205 .005
.070 ±.003
through 1/16 to to to to to to to to .002
(1.78 mm)
050 .052 .023 32 .005 .098 .143 .210 .015
102 .081 .017 17 .002 .140 .171 .238 .005
.103 ±.003
through 3/32 to to to to to to to to .002
(2.62 mm)
178 .083 .025 24 .005 .145 .176 .243 .015
201 .111 .022 16 .003 .187 .208 .275 .010
.139 ±.004
through 1/8 to to to to to to to to .003
(3.53 mm)
284 .113 .032 23 .006 .192 .213 .280 .025
309 .170 .032 15 .003 .281 .311 .410 .020
.210 ±.005
through 3/16 to to to to to to to to .004
(5.33 mm)
395 .173 .045 21 .006 .286 .316 .415 .035
425 .226 .040 15 .004 .375 .408 .538 .020
.275 ±.006
through 1/4 to to to to to to to to .005
(6.99 mm)
475 .229 .055 20 .007 .380 .413 .543 .035
(a) Clearance (extrusion gap) must be held to a minimum consistent with design requirements for temperature range variation.
(b) Total indicator reading between groove and adjacent bearing surface.
(c) Reduce maximum diametral clearance 50% when using silicone or fluorosilicone O-rings.
(d) For ease of assembly, when Parbaks are used, gland depth may be increased up to 5%.
Design Chart 4-2: For Industrial O-Ring Static Seal Glands

Parker Hannifin Corporation • O-Ring Division 4-9

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.†
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD
Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
2-001 .029 .004 .040 .109 .105 .101 .040 .044 * .103 .042 .055
002 .042 .004 .050 .142 .138 .132 .002 .053 .059 .002 * .136 .055 .070
003 .056 .004 .060 .176 .172 .162 .067 .077 * .170 .069 .083
004 .070 .005 .210 .206 .181 .081 .106 * .204 .083
005 .101 .005 .241 .237 .212 .112 .137 * .235 .114
006 .114 .005 .254 .250 .225 .125 .150 * .248 .127
007 .145 .005 .285 .281 .256 .156 .181 * .279 .158
008 .176 .005 .316 .312 .287 .187 .212 * .310 .189
009 .208 .005 .348 .343 .318 .218 .243 * .341 .220
010 .239 .005 .379 .375 .350 .250 .275 * .373 .252
011 .301 .005 .441 .437 .412 .312 .337 * .435 .314
012 .364 .005 .504 .500 .475 .375 .400 * .498 .377
013 .426 .005 .566 .562 .537 .437 .462 .560 .439
014 .489 .005 .629 .625 .600 .500 .525 .623 .502
015 .551 .007 .691 .687 .662 .562 .587 .685 .564
016 .614 .009 .754 .750 .725 .625 .650 .748 .627
017 .676 .009 .816 .812 .787 .687 .712 .810 .689
018 .739 .009 .879 .875 .850 .750 .775 .873 .752
019 .801 .009 .941 .937 .912 .812 .837 .935 .814
020 .864 .009 1.004 1.000 .975 .875 .900 .998 .877
021 .926 .009 1.066 1.062 1.037 .937 .962 1.060 .939 .093
022 .989 .010 .070 1.129 1.125 1.100 .002 1.000 1.025 .002 1.123 1.002
023 1.051 .010 ±.003 1.191 1.187 1.162 1.062 1.087 1.185 1.064
024 1.114 .010 1.254 1.250 1.225 1.125 1.150 1.248 1.127
025 1.176 .011 1.316 1.312 1.287 1.187 1.212 1.310 1.189
026 1.239 .011 1.379 1.375 1.350 1.250 1.275 1.373 1.252
027 1.301 .011 1.441 1.437 1.412 1.312 1.337 1.435 1.314
028 1.364 .013 1.504 1.500 1.475 1.375 1.400 1.498 1.377
029 1.489 .013 1.629 1.625 1.600 1.500 1.525 1.623 1.502
030 1.614 .013 1.754 1.750 1.725 1.625 1.650 1.748 1.627
031 1.739 .015 1.879 1.875 1.850 1.750 1.775 1.873 1.752
032 1.864 .015 2.004 2.000 1.975 1.875 1.900 1.998 1.877
033 1.989 .018 2.129 2.125 2.100 2.000 2.025 2.123 2.002
034 2.114 .018 2.254 2.250 2.225 2.125 2.150 2.248 2.127
035 2.239 .018 2.379 2.375 2.350 2.250 2.275 2.373 2.252
036 2.364 .018 2.504 2.500 2.475 2.375 2.400 2.498 2.377
037 2.489 .018 2.629 2.625 2.600 2.500 2.525 2.623 2.502
038 2.614 .020 2.754 2.750 2.725 2.625 2.650 2.748 2.627
039 2.739 .020 2.879 2.875 2.850 2.750 2.775 2.873 2.752
040 2.864 .020 3.004 3.000 2.975 2.875 2.900 2.998 2.877
041 2.989 .024 3.129 3.125 3.100 3.000 3.025 3.123 3.002
042 3.239 .024 3.379 3.375 3.350 3.250 3.275 3.373 3.252
043 3.489 .024 3.629 3.625 3.600 3.500 3.525 3.623 3.502
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

4-10 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.† (Continued)
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD

Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
044 3.739 .027 3.879 3.875 3.850 3.750 3.775 3.873 3.752
045 3.989 .027 .070 4.129 4.125 4.100 .002 4.000 4.025 .002 4.123 4.002 .093
046 4.239 .030 ±.003 4.379 4.375 4.350 4.250 4.275 4.373 4.252
047 4.489 .030 4.629 4.625 4.600 4.500 4.525 4.623 4.502
048 4.739 .030 4.879 4.875 4.850 4.750 4.775 4.873 4.752
049 4.989 .037 5.129 5.125 5.100 5.000 5.025 5.123 5.002
050 5.239 .037 5.379 5.375 5.350 5.250 5.275 5.373 5.252
102 .049 .005 .255 .247 .224 .062 .085 * .245 .064
103 .081 .005 .287 .278 .256 .094 .116 * .276 .095
104 .112 .005 .318 .310 .287 .125 .148 * .308 .127
105 .143 .005 .349 .342 .318 .156 .180 * .340 .158
106 .174 .005 .380 .374 .349 .187 .212 * .372 .189
107 .206 .005 .412 .405 .381 .219 .243 * .403 .221
108 .237 .005 .443 .437 .412 .250 .275 * .435 .252
109 .299 .005 .505 .500 .474 .312 .338 * .498 .314
110 .362 .005 .568 .562 .537 .375 .400 * .560 .377
111 .424 .005 .630 .625 .599 .437 .463 * .623 .439
112 .487 .005 .693 .687 .662 .500 .525 * .685 .502
113 .549 .007 .755 .750 .724 .562 .588 * .748 .564
114 .612 .009 .818 .812 .787 .625 .650 .810 .627
115 .674 .009 .880 .875 .849 .687 .713 .873 .689
116 .737 .009 .943 .937 .912 .750 .775 .935 .752
117 .799 .010 1.005 1.000 .974 .812 .838 .998 .814
118 .862 .010 1.068 1.062 1.037 .875 .900 1.060 .877
119 .924 .010 .103 1.130 1.125 1.099 .002 .937 .963 .002 1.123 .939 .140
120 .987 .010 ±.003 1.193 1.187 1.162 1.000 1.025 1.185 1.002
121 1.049 .010 1.255 1.250 1.224 1.062 1.088 1.248 1.064
122 1.112 .010 1.318 1.312 1.287 1.125 1.150 1.310 1.127
123 1.174 .012 1.380 1.375 1.349 1.187 1.213 1.373 1.189
124 1.237 .012 1.443 1.437 1.412 1.250 1.275 1.435 1.252
125 1.299 .012 1.505 1.500 1.474 1.312 1.338 1.498 1.314
126 1.362 .012 1.568 1.562 1.537 1.375 1.400 1.560 1.377
127 1.424 .012 1.630 1.625 1.599 1.437 1.463 1.623 1.439
128 1.487 .012 1.693 1.687 1.662 1.500 1.525 1.685 1.502
129 1.549 .015 1.755 1.750 1.724 1.562 1.588 1.748 1.564
130 1.612 .015 1.818 1.812 1.787 1.625 1.650 1.810 1.627
131 1.674 .015 1.880 1.875 1.849 1.687 1.713 1.873 1.689
132 1.737 .015 1.943 1.937 1.912 1.750 1.775 1.935 1.752
133 1.799 .015 2.005 2.000 1.974 1.812 1.838 1.998 1.814
134 1.862 .015 2.068 2.062 2.037 1.875 1.900 2.060 1.877
135 1.925 .017 2.131 2.125 2.099 1.937 1.963 2.123 1.939
136 1.987 .017 2.193 2.187 2.162 2.000 2.025 2.185 2.002
137 2.050 .017 2.256 2.250 2.224 2.062 2.088 2.248 2.064
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

Parker Hannifin Corporation • O-Ring Division 4-11

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.† (Continued)
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD
Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
138 2.112 .017 2.318 2.312 2.287 2.125 2.150 2.310 2.127
139 2.175 .017 2.381 2.375 2.349 2.187 2.213 2.373 2.189
140 2.237 .017 2.443 2.437 2.412 2.250 2.275 2.435 2.252
141 2.300 .020 2.506 2.500 2.474 2.312 2.338 2.498 2.315
142 2.362 .020 2.568 2.562 2.537 2.375 2.400 2.560 2.377
143 2.425 .020 2.631 2.625 2.599 2.437 2.463 2.623 2.439
144 2.487 .020 2.693 2.687 2.662 2.500 2.525 2.685 2.502
145 2.550 .020 2.756 2.750 2.724 2.562 2.588 2.748 2.564
146 2.612 .020 2.818 2.812 2.787 2.625 2.650 2.810 2.627
147 2.675 .022 2.881 2.875 2.849 2.687 2.713 2.873 2.689
148 2.737 .022 2.943 2.937 2.912 2.750 2.775 2.935 2.752
149 2.800 .022 3.006 3.000 2.974 2.812 2.838 2.998 2.814
150 2.862 .022 3.068 3.062 3.037 2.875 2.900 3.060 2.877
151 2.987 .024 3.193 3.187 3.162 3.000 3.025 3.185 3.002
152 3.237 .024 3.443 3.437 3.412 3.250 3.275 3.435 3.252
153 3.487 .024 3.693 3.687 3.662 3.500 3.525 3.685 3.502
154 3.737 .028 .103 3.943 3.937 3.912 .002 3.750 3.775 .002 3.935 3.752 .140
155 3.987 .028 ±.003 4.193 4.187 4.162 4.000 4.025 4.185 4.002
156 4.237 .030 4.443 4.437 4.412 4.250 4.275 4.435 4.252
157 4.487 .030 4.693 4.687 4.662 4.500 4.525 4.685 4.502
158 4.737 .030 4.943 4.937 4.912 4.750 4.775 4.935 4.752
159 4.987 .035 5.193 5.187 5.162 5.000 5.025 5.185 5.002
160 5.237 .035 5.443 5.437 5.412 5.250 5.275 5.435 5.252
161 5.487 .035 5.693 5.687 5.662 5.500 5.525 5.685 5.502
162 5.737 .035 5.943 5.937 5.912 5.750 5.775 5.935 5.752
163 5.987 .035 6.193 6.187 6.162 6.000 6.025 6.185 6.002
164 6.237 .040 6.443 6.437 6.412 6.250 6.275 6.435 6.252
165 6.487 .040 6.693 6.687 6.662 6.500 6.525 6.685 6.502
166 6.737 .040 6.943 6.937 6.912 6.750 6.775 6.935 6.752
167 6.987 .040 7.193 7.187 7.162 7.000 7.025 7.185 7.002
168 7.237 .045 7.443 7.437 7.412 7.250 7.275 7.435 7.252
169 7.487 .045 7.693 7.687 7.662 7.500 7.525 7.685 7.502
170 7.737 .045 7.943 7.937 7.912 7.750 7.775 7.935 7.752
171 7.987 .045 8.193 8.187 8.162 8.000 8.025 8.185 8.002
172 8.237 .050 8.443 8.437 8.412 8.250 8.275 8.435 8.252
173 8.487 .050 8.693 8.687 8.662 8.500 8.525 8.685 8.502
174 8.737 .050 8.943 8.937 8.912 8.750 8.775 8.935 8.752
175 8.987 .050 9.193 9.187 9.162 9.000 9.025 9.185 9.002
176 9.237 .055 9.443 9.437 9.412 9.250 9.275 9.435 9.252
177 9.487 .055 9.693 9.687 9.662 9.500 9.525 9.685 9.502
178 9.737 .055 9.943 9.937 9.912 9.750 9.775 9.935 9.752
201 .171 .005 .139 .449 .437 .409 .187 .215 * .434 .190
202 .234 .005 ±.004 .512 .500 .472 .002 .250 .278 .002 * .497 .253 .187
203 .296 .005 .574 .562 .534 .312 .340 * .559 .315
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

4-12 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.† (Continued)
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD

Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
204 .359 .005 .637 .625 .597 .375 .403 .622 .378
205 .421 .005 .699 .687 .659 .437 .465 .684 .440
206 .484 .005 .762 .750 .722 .500 .528 .747 .503
207 .546 .007 .824 .812 .784 .562 .590 .809 .565
208 .609 .009 .887 .875 .847 .625 .653 .872 .628
209 .671 .009 .949 .937 .909 .687 .715 .934 .690
210 .734 .010 1.012 1.000 .972 .750 .778 .997 .753
211 .796 .010 1.074 1.062 1.034 .812 .840 1.059 .815
212 .859 .010 1.137 1.125 1.097 .875 .903 1.122 .878
213 .921 .010 1.199 1.187 1.159 .937 .965 1.184 .940
214 .984 .010 1.262 1.250 1.222 1.000 1.028 1.247 1.003
215 1.046 .010 1.324 1.312 1.284 1.062 1.090 1.309 1.065
216 1.109 .012 1.387 1.375 1.347 1.125 1.153 1.372 1.128
217 1.171 .012 1.449 1.437 1.409 1.187 1.215 1.434 1.190
218 1.234 .012 1.512 1.500 1.472 1.250 1.278 1.497 1.253
219 1.296 .012 1.574 1.562 1.534 1.312 1.340 1.559 1.315
220 1.359 .012 .139 1.637 1.625 1.597 .002 1.375 1.403 .002 1.622 1.378 .187
221 1.421 .012 ±.004 1.700 1.687 1.659 1.437 1.465 1.684 1.440
222 1.484 .015 1.762 1.750 1.722 1.500 1.528 1.747 1.503
223 1.609 .015 1.887 1.875 1.847 1.625 1.653 1.872 1.628
224 1.734 .015 2.012 2.000 1.972 1.750 1.778 1.997 1.753
225 1.859 .015 2.137 2.125 2.097 1.875 1.903 2.122 1.878
226 1.984 .018 2.262 2.250 2.222 2.000 2.028 2.247 2.003
227 2.109 .018 2.387 2.375 2.347 2.125 2.153 2.372 2.128
228 2.234 .020 2.512 2.500 2.472 2.250 2.278 2.497 2.253
229 2.359 .020 2.637 2.625 2.597 2.375 2.403 2.622 2.378
230 2.484 .020 2.762 2.750 2.722 2.500 2.528 2.747 2.503
231 2.609 .020 2.887 2.875 2.847 2.625 2.653 2.872 2.628
232 2.734 .024 3.012 3.000 2.972 2.750 2.778 2.997 2.753
233 2.859 .024 3.137 3.125 3.097 2.875 2.903 3.122 2.878
234 2.984 .024 3.262 3.250 3.222 3.000 3.028 3.247 3.003
235 3.109 .024 3.387 3.375 3.347 3.125 3.153 3.372 3.128
236 3.234 .024 3.512 3.500 3.472 3.250 3.278 3.497 3.253
237 3.359 .024 3.637 3.625 3.597 3.375 3.403 3.622 3.378
238 3.484 .024 3.762 3.750 3.722 3.500 3.528 3.747 3.503
239 3.609 .028 3.887 3.875 3.847 3.625 3.653 3.872 3.628
240 3.734 .028 4.012 4.000 3.972 3.750 3.778 3.997 3.753
241 3.859 .028 4.137 4.125 4.097 3.875 3.903 4.122 3.878
242 3.984 .028 4.262 4.250 4.222 4.000 4.028 4.247 4.003
243 4.109 .028 4.387 4.375 4.347 4.125 4.153 4.372 4.128
244 4.234 .030 4.512 4.500 4.472 4.250 4.278 4.497 4.253
245 4.359 .030 4.637 4.625 4.597 4.375 4.403 4.622 4.378
246 4.484 .030 4.762 4.750 4.722 4.500 4.528 4.747 4.503
247 4.609 .030 4.887 4.875 4.847 4.625 4.653 4.872 4.628
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

Parker Hannifin Corporation • O-Ring Division 4-13

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.† (Continued)
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD
Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
248 4.734 .030 5.012 5.000 4.972 4.750 4.778 4.997 4.753
249 4.859 .035 5.137 5.125 5.097 4.875 4.903 5.122 4.878
250 4.984 .035 5.262 5.250 5.222 5.000 5.028 5.247 5.003
251 5.109 .035 5.387 5.375 5.347 5.125 5.153 5.372 5.128
252 5.234 .035 5.512 5.500 5.472 5.250 5.278 5.497 5.253
253 5.359 .035 5.637 5.625 5.597 5.375 5.403 5.622 5.378
254 5.484 .035 5.762 5.750 5.722 5.500 5.528 5.747 5.503
255 5.609 .035 5.887 5.875 5.847 5.625 5.653 5.872 5.628
256 5.734 .035 6.012 6.000 5.972 5.750 5.778 5.997 5.753
257 5.859 .035 6.137 6.125 6.097 5.875 5.903 6.122 5.878
258 5.984 .035 6.262 6.250 6.222 6.000 6.028 6.247 6.003
259 6.234 .040 6.512 6.500 6.472 6.250 6.278 6.497 6.253
260 6.484 .040 6.762 6.750 6.722 6.500 6.528 6.747 6.503
261 6.734 .040 7.012 7.000 6.972 6.750 6.778 6.997 6.753
262 6.984 .040 7.262 7.250 7.222 7.000 7.028 7.247 7.003
263 7.234 .045 7.512 7.500 7.472 7.250 7.278 7.497 7.253
264 7.484 .045 7.762 7.750 7.722 7.500 7.528 7.747 7.503
265 7.734 .045 .139 8.012 8.000 7.972 .002 7.750 7.778 .002 7.997 7.753 .187
266 7.984 .045 ±.004 8.262 8.250 8.222 8.000 8.028 8.247 8.003
267 8.234 .050 8.512 8.500 8.472 8.250 8.278 8.497 8.253
268 8.484 .050 8.762 8.750 8.722 8.500 8.528 8.747 8.503
269 8.734 .050 9.012 9.000 8.972 8.750 8.778 8.997 8.753
270 8.984 .050 9.262 9.250 9.222 9.000 9.028 9.247 9.003
271 9.234 .055 9.512 9.500 9.472 9.250 9.278 9.497 9.253
272 9.484 .055 9.762 9.750 9.722 9.500 9.528 9.747 9.503
273 9.734 .055 10.012 10.000 9.972 9.750 9.778 9.997 9.753
274 9.984 .055 10.262 10.250 10.222 10.000 10.028 10.247 10.003
275 10.484 .055 10.762 10.750 10.722 10.500 10.528 10.747 10.503
276 10.984 .065 11.262 11.250 11.222 11.000 11.028 11.247 11.003
277 11.484 .065 11.762 11.750 11.722 11.500 11.528 11.747 11.503
278 11.984 .065 12.262 12.250 12.222 12.000 12.028 12.247 12.003
279 12.984 .065 13.262 13.250 13.222 13.000 13.028 13.247 13.003
280 13.984 .065 14.262 14.250 14.222 14.000 14.028 14.247 14.003
281 14.984 .065 15.262 15.250 15.222 15.000 15.028 15.247 15.003
282 15.955 .075 16.233 16.250 16.222 16.000 16.028 16.247 16.003
283 16.955 .080 17.233 17.250 17.222 17.000 17.028 17.247 17.003
284 17.955 .085 18.233 18.250 18.222 18.000 18.028 18.247 18.003
309 .412 .005 .832 .812 .777 .437 .472 * .809 .440
310 .475 .005 .210 .895 .875 .840 .500 .535 * .872 .503
311 .537 .007 ±.005 .957 .937 .902 .004 .562 .597 .004 * .934 .565 .281
312 .600 .009 1.020 1.000 .965 .625 .660 .997 .628
313 .662 .009 1.082 1.062 1.027 .687 .722 1.059 .690
314 .725 .010 1.145 1.125 1.090 .750 .785 1.122 .753
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

4-14 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.† (Continued)
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD

Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
315 .787 .010 1.207 1.187 1.152 .812 .847 1.184 .815
316 .850 .010 1.270 1.250 1.215 .875 .910 1.247 .878
317 .912 .010 1.332 1.312 1.277 .937 .972 1.309 .940
318 .975 .010 1.395 1.375 1.340 1.000 1.035 1.372 1.003
319 1.037 .010 1.457 1.437 1.402 1.062 1.097 1.434 1.065
320 1.100 .012 1.520 1.500 1.465 1.125 1.160 1.497 1.128
321 1.162 .012 1.582 1.562 1.527 1.187 1.222 1.559 1.190
322 1.225 .012 1.645 1.625 1.590 1.250 1.285 1.622 1.253
323 1.287 .012 1.707 1.687 1.652 1.312 1.347 1.684 1.315
324 1.350 .012 1.770 1.750 1.715 1.375 1.410 1.747 1.378
325 1.475 .015 1.895 1.875 1.840 1.500 1.535 1.872 1.503
326 1.600 .015 2.020 2.000 1.965 1.625 1.660 1.997 1.628
327 1.725 .015 2.145 2.125 2.090 1.750 1.785 2.122 1.753
328 1.850 .015 2.270 2.250 2.215 1.875 1.910 2.247 1.878
329 1.975 .018 2.395 2.375 2.340 2.000 2.035 2.372 2.003
330 2.100 .018 2.520 2.500 2.465 2.125 2.160 2.497 2.128
331 2.225 .018 2.645 2.625 2.590 2.250 2.285 2.622 2.253
332 2.350 .018 2.770 2.750 2.715 2.375 2.410 2.747 2.378
333 2.475 .020 2.895 2.875 2.840 2.500 2.535 2.872 2.503
334 2.600 .020 3.020 3.000 2.965 2.625 2.660 2.997 2.628
335 2.725 .020 3.145 3.125 3.090 2.750 2.785 3.122 2.753
336 2.850 .020 .210 3.270 3.250 3.215 .004 2.875 2.910 .004 3.247 2.878 .281
337 2.975 .024 ±.005 3.395 3.375 3.340 3.000 3.035 3.372 3.003
338 3.100 .024 3.520 3.500 3.465 3.125 3.160 3.497 3.128
339 3.225 .024 3.645 3.625 3.590 3.250 3.285 3.622 3.253
340 3.350 .024 3.770 3.750 3.715 3.375 3.410 3.747 3.378
341 3.475 .024 3.895 3.875 3.840 3.500 3.535 3.872 3.502
342 3.600 .028 4.020 4.000 3.965 3.625 3.660 3.997 3.628
343 3.725 .028 4.145 4.125 4.090 3.750 3.785 4.122 3.753
344 3.850 .028 4.270 4.250 4.215 3.875 3.910 4.247 3.878
345 3.975 .028 4.395 4.375 4.340 4.000 4.035 4.372 4.003
346 4.100 .028 4.520 4.500 4.465 4.125 4.160 4.497 4.128
347 4.225 .030 4.645 4.625 4.590 4.250 4.285 4.622 4.253
348 4.350 .030 4.770 4.750 4.717 4.375 4.410 4.747 4.378
349 4.475 .030 4.895 4.875 4.840 4.500 4.535 4.872 4.503
350 4.600 .030 5.020 5.000 4.965 4.625 4.660 4.997 4.628
351 4.725 .030 5.145 5.125 5.090 4.750 4.785 5.122 4.753
352 4.850 .030 5.270 5.250 5.215 4.875 4.910 5.247 4.878
353 4.975 .037 5.395 5.375 5.340 5.000 5.035 5.372 5.003
354 5.100 .037 5.520 5.500 5.465 5.125 5.160 5.497 5.128
355 5.225 .037 5.645 5.625 5.590 5.250 5.285 5.622 5.253
356 5.350 .037 5.770 5.750 5.715 5.375 5.410 5.747 5.378
357 5.475 .037 5.895 5.875 5.840 5.500 5.535 5.872 5.503
358 5.600 .037 6.020 6.000 5.965 5.625 5.660 5.997 5.628
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

Parker Hannifin Corporation • O-Ring Division 4-15

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.† (Continued)
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD
Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
359 5.725 .037 6.145 6.125 6.090 5.750 5.785 6.122 5.753
360 5.850 .037 6.270 6.250 6.215 5.875 5.910 6.247 5.878
361 5.975 .037 6.395 6.375 6.340 6.000 6.035 6.372 6.003
362 6.225 .040 6.645 6.625 6.590 6.250 6.285 6.622 6.253
363 6.475 .040 6.895 6.875 6.840 6.500 6.535 6.872 6.503
364 6.725 .040 7.145 7.125 7.090 6.750 6.785 7.122 6.753
365 6.975 .040 7.395 7.375 7.340 7.000 7.035 7.372 7.003
366 7.225 .045 7.645 7.625 7.590 7.250 7.285 7.622 7.253
367 7.475 .045 7.895 7.875 7.840 7.500 7.535 7.872 7.503
368 7.725 .045 8.145 8.125 8.090 7.750 7.785 8.122 7.753
369 7.975 .045 8.395 8.375 8.340 8.000 8.035 8.372 8.003
370 8.225 .050 8.645 8.625 8.590 8.250 8.285 8.622 8.253
371 8.475 .050 8.895 8.875 8.840 8.500 8.535 8.872 8.503
372 8.725 .050 9.145 9.125 9.090 8.750 8.785 9.122 8.753
373 8.975 .050 9.395 9.375 9.340 9.000 9.035 9.372 9.003
374 9.225 .055 9.645 9.625 9.590 9.250 9.285 9.622 9.253
375 9.475 .055 9.895 9.875 9.840 9.500 9.535 9.872 9.503
376 9.725 .055 10.145 10.125 10.090 9.750 9.785 10.122 9.753
377 9.975 .055 .210 10.395 10.375 10.340 .004 10.000 10.035 .004 10.372 10.003 .281
378 10.475 .060 ±.005 10.895 10.875 10.840 10.500 10.535 10.872 10.503
379 10.975 .060 11.395 11.375 11.340 11.000 11.035 11.372 11.003
380 11.475 .065 11.895 11.875 11.840 11.500 11.535 11.872 11.503
381 11.975 .065 12.395 12.375 12.340 12.000 12.035 12.372 12.003
382 12.975 .065 13.395 13.375 13.340 13.000 13.035 13.372 13.003
383 13.975 .070 14.395 14.375 14.340 14.000 14.035 14.372 14.003
384 14.975 .070 15.395 15.375 15.340 15.000 15.035 15.372 15.003
385 15.955 .075 16.375 16.375 16.340 16.000 16.035 16.372 16.003
386 16.955 .080 17.375 17.375 17.340 17.000 17.035 17.372 17.003
387 17.955 .085 18.375 18.375 18.340 18.000 18.035 18.372 18.003
388 18.955 .090 19.373 19.375 19.340 19.000 19.035 19.372 19.003
389 19.955 .095 20.373 20.375 20.340 20.000 20.035 20.372 20.003
390 20.955 .095 21.373 21.375 21.340 21.000 21.035 21.372 21.003
391 21.955 .100 22.373 22.375 22.340 22.000 22.035 22.372 22.003
392 22.940 .105 23.360 23.375 23.340 23.000 23.035 23.372 23.003
393 23.940 .110 24.360 24.375 24.340 24.000 24.035 24.372 24.003
394 24.940 .115 25.360 25.375 25.340 25.000 25.035 25.372 25.003
395 25.940 .120 26.360 26.375 26.340 26.000 26.035 26.372 26.003
425 4.475 .033 5.025 5.000 4.952 4.500 4.548 4.996 4.504
426 4.600 .033 5.150 5.125 5.077 4.625 4.673 5.121 4.629
427 4.725 .033 .275 5.275 5.250 5.202 .004 4.750 4.798 .004 5.246 4.754 .375
428 4.850 .033 ±.006 5.400 5.375 5.327 4.875 4.923 5.371 4.879
429 4.975 .037 5.525 5.500 5.452 5.000 5.048 5.496 5.004
430 5.100 .037 5.650 5.625 5.577 5.125 5.173 5.621 5.129
431 5.225 .037 5.775 5.750 5.702 5.250 5.298 5.746 5.254
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

4-16 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.† (Continued)
A A-1 B B-1 C D G†

(Female Gland)

(Female Gland)

(Female Gland)

Groove Width
(Male Gland)

(Male Gland)

(Male Gland)
Groove Dia.

Groove Dia.

Throat Dia.
Bore Dia.

Plug Dia.
Tube OD

Static O-Ring Sealing

O-Ring
Size Dimensions
Parker Mean +.002 +.000 +.000 +.001 +.005
No. 2- ID ± W OD (Ref) -.000 -.000 + -.002 +.000 – .001 -.000 -.000
432 5.350 .037 5.900 5.875 5.827 5.375 5.423 5.871 5.379
433 5.475 .037 6.025 6.000 5.952 5.500 5.548 5.996 5.504
434 5.600 .037 6.150 6.125 6.077 5.625 5.673 6.121 5.629
435 5.725 .037 6.275 6.250 6.202 5.750 5.798 6.246 5.754
436 5.850 .037 6.400 6.375 6.327 5.875 5.923 6.371 5.879
437 5.975 .037 6.525 6.500 6.452 6.000 6.048 6.496 6.004
438 6.225 .040 6.775 6.750 6.702 6.250 6.298 6.746 6.254
439 6.475 .040 7.025 7.000 6.952 6.500 6.548 6.996 6.504
440 6.725 .040 7.275 7.250 7.202 6.750 6.798 7.246 6.754
441 6.975 .040 7.525 7.500 7.452 7.000 7.048 7.496 7.004
442 7.225 .045 7.775 7.750 7.702 7.250 7.298 7.746 7.254
443 7.475 .045 8.025 8.000 7.952 7.500 7.548 7.996 7.504
444 7.725 .045 8.275 8.250 8.202 7.750 7.798 8.246 7.754
445 7.975 .045 8.525 8.500 8.452 8.000 8.048 8.496 8.004
446 8.475 .055 9.025 9.000 8.952 8.500 8.548 8.996 8.504
447 8.975 .055 9.525 9.500 9.452 9.000 9.048 9.496 9.004
448 9.475 .055 10.025 10.000 9.952 9.500 9.548 9.996 9.504
449 9.975 .055 10.525 10.500 10.452 10.000 10.048 10.496 10.000
450 10.475 .060 11.025 11.000 10.952 10.500 10.548 10.996 10.504
451 10.975 .060 11.525 11.500 11.452 11.000 11.048 11.496 11.004
452 11.475 .060 12.025 12.000 11.952 11.500 11.548 11.996 11.504
453 11.975 .060 12.525 12.500 12.452 12.000 12.048 12.496 12.004
454 12.475 .060 .275 13.025 13.000 12.952 .004 12.500 12.548 .004 12.996 12.504 .375
455 12.975 .060 ±.006 13.525 13.500 13.452 13.000 13.048 13.496 13.004
456 13.475 .070 14.025 14.000 13.952 13.500 13.548 13.996 13.504
457 13.975 .070 14.525 14.500 14.452 14.000 14.048 14.496 14.004
458 14.475 .070 15.025 15.000 14.952 14.500 14.548 14.996 14.504
459 14.975 .070 15.525 15.500 15.452 15.000 15.048 15.496 15.004
460 15.475 .070 16.025 16.000 15.952 15.500 15.548 15.996 15.504
461 15.955 .075 16.505 16.500 16.452 16.000 16.048 16.496 16.004
462 16.455 .075 17.005 17.000 16.952 16.500 16.548 16.996 16.504
463 16.955 .080 17.505 17.500 17.452 17.000 17.048 17.496 17.004
464 17.455 .085 18.005 18.000 17.952 17.500 17.548 17.996 17.504
465 17.955 .085 18.505 18.500 18.452 18.000 18.048 18.496 18.004
466 18.455 .085 19.005 19.000 18.952 18.500 18.548 18.996 18.504
467 18.955 .090 19.505 19.500 19.452 19.000 19.048 19.496 19.004
468 19.455 .090 20.005 20.000 19.952 19.500 19.548 19.996 19.504
469 19.955 .095 20.505 20.500 20.452 20.000 20.048 20.496 20.004
470 20.955 .095 21.505 21.500 21.452 21.000 21.048 21.496 21.004
471 21.955 .100 22.505 22.500 22.452 22.000 22.048 22.496 22.004
472 22.940 .105 23.490 23.500 23.452 23.000 23.048 23.496 23.004
473 23.940 .110 24.490 24.500 24.452 24.000 24.048 24.496 24.004
474 24.940 .115 25.490 25.500 25.452 25.000 25.048 25.496 25.004
475 25.940 .120 26.490 26.500 26.452 26.000 26.048 26.496 26.004
† This groove width does not permit the use of Parbak rings. For pressures above 103.5 Bar (1500 psi), consult Design Chart 4-2 for groove widths where
back-up rings must be used.
* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.

Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max.

Parker Hannifin Corporation • O-Ring Division 4-17

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Face Seal Glands

For Internal Pressure
(outward pressure direction)
dimension the groove by its
outside diameter (HO ) and width:
Static O-Ring Sealing

(HO ) = Mean O.D. of O-ring L

(see Table 4-1)
Tolerance = Minus 1% of Mean
O.D., but not more than
-.060

For External Pressure

(inward pressure direction)
dimension the groove by its
inside diameter (Hi) and width:
(H)i = Mean I.D. of O-ring
(see Table 4-1)
Tolerance = Plus 1% of Mean
I.D., but not more than
+.060

0° to 5°*
(Typ.) Break Cor ners Section W-W
Approx. .005 RA D. W W
X .005
Max.
R Groove W
63

L Depth
63

Surface finish X: I.D.

32 for liquids X (= Gland Depth)
16 for vacuum
and gases .003 Max.
G
Gland Detail
Finishes are RMS values (Refer to Design Chart 4-3 below)

O-Ring Face Seal Glands These dimensions are intended primarily for face type O-ring seals and low temperature applications.
O-Ring G
Size W L Groove Width R
Parker Cross Section Gland Squeeze Vacuum Groove
No. 2 Nominal Actual Depth Actual % Liquids and Gases Radius
004 .050 .013 19 .101 .084 .005
.070 ±.003
through 1/16 to to to to to to
(1.78 mm)
050 .054 .023 32 .107 .089 .015
102 .074 .020 20 .136 .120 .005
.103 ±.003
through 3/32 to to to to to to
(2.62 mm)
178 .080 .032 30 .142 .125 .015
201 .101 .028 20 .177 .158 .010
.139 ±.004
through 1/8 to to to to to to
(3.53 mm
284 .107 .042 30 .187 .164 .025
309 .152 .043 21 .270 .239 .020
.210 ±.005
through 3/16 to to to to to to
(5.33 mm)
395 .162 .063 30 .290 .244 .035
425 .201 .058 21 .342 .309 .020
.275 ±.006
through 1/4 to to to to to to
(6.99 mm)
475 .211 .080 29 .362 .314 .035
.276 .082 22 .475 .419 .030
.375 ±.007
Special 3/8 to to to to to to
(9.52 mm)
.286 .106 28 .485 .424 .045
.370 .112 22 .638 .560 .030
.500 ±.008
Special 1/2 to to to to to to
(12.7 mm)
.380 .138 27 .645 .565 .045
Design Chart 4-3: Design Chart for O-Ring Face Seal Glands

4-18 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Dovetail Grooves
It is often necessary to provide some mechanical means for holding G
an O-ring in a face seal groove during assembly and maintenance of
equipment. An undercut or dovetail groove has proven beneficial in many
applications to keep the O-ring in place. This is an expensive groove

Static O-Ring Sealing

to machine, however, and thus should be used only when absolutely
necessary.
L R
It should be noted that although this method has been used success-
66°
fully, it is not generally recommended. The inherent characteristics of the
groove design limit the amount of void area. Normally acceptable toler- R1
ance extremes, wide service temperature ranges, and fluid media that
cause high swell of the elastomer are conditions that cannot be tolerated
in this type of groove design. Mean Groove
Diameter Coincides
With Mean
O-ring Diameter. Finishes are RMS values

O-Ring Dovetail Grooves

Radius “R” is CRITICAL. Insufficient radius will potentially cause damage to the O-ring during installation, while excessive radius may contribute to extrusion.
G
O-Ring W L Groove Width
Size Cross Section Gland (To sharp
AS568A- Nominal Actual Depth Squeeze % corner) R R1
004 .053 .057
.070
through 1/16 to 23 to .005 1/64
±.003
050 .055 .061
102 .081 .083
.103
through 3/32 to 21 to .010 1/64
±.003
178 .083 .087
201 .111 .113
.139
through 1/8 to 20 to .010 1/32
±.004
284 .113 .117
309 .171 .171
.210
through 3/16 to 18 to .015 1/32
±.005
395 .173 .175
425 .231 .231
.275
through 1/4 to 16 to .015 1/16
±.006
475 .234 .235
.315 .315
.375
Special 3/8 to 16 to .020 3/32
±.007
.319 .319
NOTE: These design recommendations assume metal-to-metal contact. In special applications, for example in the semiconductor industry, deviation from these
recommendations may be necessary. When designing with Parofluor elastomers, one should take into consideration that perfluorinated elastomers may require
more squeeze than an FKM material to obtain optimum sealing performance. To increase squeeze, modifications of the design recommendations shown above
are necessary.

Design Chart 4-4: Dovetail Grooves

Parker Hannifin Corporation • O-Ring Division 4-19

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Half Dovetail Grooves

G
Static O-Ring Sealing

R
L
66°

R1
Mean Groove
Diameter Coincides
With Mean
O-ring Diameter. Finishes are RMS values

O-Ring Half Dovetail Grooves

Radius “R” is CRITICAL. Insufficient radius will potentially cause damage to the O-ring during installation, while excessive radius may contribute to extrusion.
G
O-Ring W L Groove Width
Size Cross Section Gland (To sharp
AS568A- Nominal Actual Depth Squeeze % corner) R R1
004 .053 .064
.070
through 1/16 to 23 to .005 1/64
±.003
050 .055 .066
102 .083 .095
.103
through 3/32 to 19 to .010 1/64
±.003
178 .085 .097
201 .113 .124
.139
through 1/8 to 18 to .010 1/32
±.004
284 .115 .128
309 .173 .190
.210
through 3/16 to 17 to .015 1/32
±.005
395 .176 .193
425 .234 .255
.275
through 1/4 to 15 to .015 1/16
±.006
475 .238 .257
.319 .350
.375
Special 3/8 to 14 to .020 3/32
±.007 .323 .358
NOTE: These design recommendations assume metal-to-metal contact. In special applications, for example in the semiconductor industry, deviation from these
recommendations may be necessary. When designing with Parofluor elastomers, one should take into consideration that perfluorinated elastomers may require
more squeeze than an FKM material to obtain optimum sealing performance. To increase squeeze, modifications of the design recommendations shown above
are necessary.
Design Chart 4-5: Half Dovetail Grooves

4-20 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Triangular Grooves

This type of crush seal is used where cost and ease of machining are im-
portant. The O-Ring is confined in a triangular recess made by machining a
45 degree angle on the male cover. The OD of the ring should be about the
same as the recess diameter. The same sealing principle applies to crush

Static O-Ring Sealing

type seals used in recesses of straight thread tubing bosses. Pressures
are limited only by clearances and the strength of the mating parts. The
O-Rings are permanently deformed.

Static Crush Seal Grooves

L
W Gland Depth
O-Ring CS Actual + +
Size Number in +/- mm +/- in (- 0.000) mm (- 0.000)
004
through 0.070 0.003 1.78 0.08 0.092 0.003 2.34 0.08
050
102
through 0.103 0.003 2.62 0.08 0.136 0.005 3.45 0.13
178
201
through 0.139 0.004 3.53 0.10 0.184 0.007 4.67 0.18
284
309
through 0.210 0.005 5.33 0.13 0.277 0.010 7.04 0.25
395
425
through 0.275 0.006 6.99 0.15 0.363 0.015 9.22 0.38
475
0.059 0.003 1.50 0.08 0.078 0.003 1.98 0.08
0.078 0.003 2.00 0.08 0.104 0.003 2.64 0.08
0.098 0.003 2.50 0.08 0.130 0.005 3.30 0.13
0.118 0.004 3.00 0 .10 0.156 0.005 3.96 0.13
Various Sizes 0.157 0.005 4.00 0.13 0.208 0.007 5.28 0.18
0.197 0.005 5.00 0.13 0.260 0.010 6.61 0.25
0.236 0.006 6.00 0.15 0.312 0.010 7.93 0.25
0.315 0.007 8.00 0.18 0.416 0.015 10.57 0.38
0.354 0.007 9.00 0.18 0.468 0.015 11.89 0.38
Design Chart 4-6: Static Crush Seal Grooves

Parker Hannifin Corporation • O-Ring Division 4-21

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Tube Fitting Boss Seals

(Note 1)
Thread T — PD must be square with Surf. K
G
within N T.I.R. across G Dia. Min.
A PD must be concentric with G Dia.
D within .030 T.I.R. and with D Dia.
Static O-Ring Sealing

125 within .005 T.I.R. D Dia. to E Depth

32
120° To G
±0° 30' 32 Concentric to D Within .005 T.I.R.
Surf. K C .040
.010R

Detail A E
Height to B
Suit Design J
.020R
Max. 45° ± 5°

Min. Clearance
Envelope for Fitting
C Detail A
Min. Dia. for unrestricted
flow of fluid may be any
Note 1: Min. flat boss face. Clearance provisions
size or shape provided for fitting, wrench, fitting installation and
clearance is maintained to tool fillet radii must be added as required.
J depth for fitting. Note 2: Tube fittings per AS5202

Boss Dimensions for Military Straight Thread Tube Fitting O-ring Gaskets per AS5202
(Supersedes AND10049, AND10050 and MS33649)
Parker Actual Equiv. A B C D E G J N
O-ring O-Ring Tube Tube Dia. Full Dia.
Size Dimensions Dash OD Thread T +.015 Thd. +.005 +.015 Dia.
No.* W ID No. Min. Per Mil-S-8879 -.000 Depth Dia. -.000 -.000 Min. Min.
3-901 .056 ± .003 .185 ± .005 1 – .2500-28UNJF-3B 0.359 0.330 0.062 0.264 0.063 0.478 0.402 0.002
3-902 .064 ± .003 .239 ± .005 2 .125 .3125-24UNJF-3B 0.438 0.482 0.062 0.328 0.602 0.577
0.063
3-903 .064 ± .003 .301 ± .005 3 .188 .3750-24UNJF-3B 0.500 0.538 0.125 0.390 0.665 0.583
0.003
3-904 .072 ± .003 .351 ± .005 4 .250 .4375-20UNJF-3B 0.562 0.172 0.454 0.728 0.656
0.568 0.075
3-905 .072 ± .003 .414 ± .005 5 .312 .5000-20UNJF-3B 0.625 0.234 0.517 0.790
3-906 .078 ± .003 .468 ± .005 6 .375 .5625-18UNJF-3B 0.688 0.598 0.297 0.580 0.083 0.852 0.709
0.004
3-907 .082 ± .003 .530 ± .007 7 .438 .6250-18UNJF-3B 0.750 0.614 0.360 0.643 0.915 0.725
0.094
3-908 .087 ± .003 .644 ± .009 8 .500 .7500-16UNJF-3B 0.875 0.714 0.391 0.769 1.040 0.834
3-909 .097 ± .003 .706 ± .009 9 .562 .8125-16UNJ-3B 0.938 0.730 0.438 0.832 1.102 0.850
0.107
3-910 .097 ± .003 .755 ± .009 10 .625 .8750-14UNJF-3B 1.000 0.802 0.484 0.896 1.165 0.960
0.005
3-911 .116 ± .004 .863 ± .009 11 .688 1.0000-12UNJF-3B 1.156 0.547 1.023 1.352
3-912 .116 ± .004 .924 ± .009 12 .750 1.0625-12UNJ-3B 1.234 0.609 1.086 1.415
1.064
3-914 .116 ± .004 1.047 ± .010 14 .875 1.1875-12UNJ-3B 1.362 0.734 1.211 1.540
3-916 .116 ± .004 1.171 ± .010 16 1.000 1.3125-12UNJ-3B 1.487 0.844 1.336 1.665
0.877
3-918 .116 ± .004 1.355 ± .012 18 1.125 1.5000-12UNJF-3B 1.675 0.953 1.524 0.125 1.790 0.008
1.116
3-920 .118 ± .004 1.475 ± .014 20 1.250 1.6250-12UNJ-3B 1.800 1.078 1.648 1.978
3-924 .118 ± .004 1.720 ± .014 24 1.500 1.8750-12UNJ-3B 2.050 1.312 1.898 2.228 1.127
3-928 .118 ± .004 2.090 ± .018 28 1.750 2.2500-12UNJ-3B 2.425 1.547 2.273 2.602 1.243 0.010
3-932 .118 ± .004 2.337 ± .018 32 2.000 2.5000-12UNJ-3B 2.675 0.907 1.781 2.524 2.852 1.368
*Parker dash numbers correspond with those of AS568A
Design Table 4-3: Boss Dimensions for Military Straight Thread Tube Fitting O-ring Gaskets per AS5202 (Supersedes AND10049,
AND10050 and MS33649)

4-22 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Tube Fitting Boss Seals

Use fitting end per AS4395

.015 RAD. for thread

runout
Chamfer relief to

Static O-Ring Sealing

F hex flats shall be
within the 15° ± 5°
angle and K dia.
limitations
Q

45° ± 5°
.031
.016 Squareness between
RAD Thread thread T and face of
K
T hex shall not exceed
Full threads to this point H at measured at
thread T diameter K

Fitting End AS4395 Used with J1926/1 and AS5202 Bosses (Supercedes MS 33656)
(Only the dimensions that define the O-ring Cavity are shown below.)

Parker E F H K G
O-ring Tubing Dimension Across +.002 Dia. +.015
Size No. OD Thread T Hex Flats -.003 Max. ±.010 -.000
3-902 1/8 5/16-24 .563 .250 .549 .063
3-903 3/16 3/8-24 .625 .312 .611 .063
3-904 1/4 7/16-20 .688 .364 .674 .075
3-905 5/16 1/2-20 UNF-3A .750 +.003 .426 .005 .736 .075
3-906 3/8 9/16-18 .813 -.004 .481 .799 .083
3-908 1/2 3/4-16 1.000 .660 .986 .094
3-910 5/8 7/8-14 1.125 .773 1.111 .107
3-912 3/4 1 1/16-12 1.375 .945 1.361
3-914* 7/8 1 3/16-12 1.500 1.070 1.475
3-916 1 1 5/16-12 1.625 ±.016 1.195 1.599
UNJ-3A .008 .125
3-920 1 1/4 1 5/8-12 1.875 1.507 1.879
3-924 1 1/2 1 7/8-12 2.125 1.756 2.095
±.020
3-932 2 2 1/2-12 2.750 2.381 2.718
*No fitting end for the 3-914 O-ring size is included in AS4395, but the dimensions shown here follow the same pattern.
Design Table Table 4-4: Fitting end AS4395 used with J1926/1 and AS5202 bosses (only the dimensions that define the
O-ring cavity are shown.)

Parker Hannifin Corporation • O-Ring Division 4-23

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
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Parker O-Ring Handbook

Tube Fitting Boss Seals

This surface shall be square with the
thread P.D. within .010 T.I.R. when measured at Dia. L
Diameter D shall be concentric
F with thread P.D. within .005 T.I.R.
Static O-Ring Sealing

L
Minimum Spotface Min. Boss D Dia.
Diameter Detail "A" Height
.010
Rad.
.005

B
J E 100
E
THD. T
K

45° ± 5°
C Dia. this dim. applies
only when tap drill can
not pass thru entire boss
Detail A
Finished tapered counterbore (Detail A) shall be be free from longitudinal and spiral tool marks.
Annular tool marks up to 100 micro-inches maximum will be permissible.

Boss Dimensions for Industrial Straight Thread Tube Fittings

O-Ring Gaskets per SAE J1926
Actual O-Ring B C D E F J K L
Parker Dimensions Min.
O-Ring Tube Thread +.005 +.015
Size W ID OD Thread T Depth Min. -.000 -.000 Min. Min. ±1° Min.
3-902 .064 ± .003 .239 ± .005 1/8 5/16-24 .390 .062 .358 .074 .672 .468 12° .438
3-903 .064 ± .003 .301 ± .005 3/16 3/8-24 .390 .125 .421 .074 .750 .468 12° .500
3-904 .072 ± .003 .351 ± .005 1/4 7/16-20 .454 .172 .487 .093 .828 .547 12° .563
3-905 .072 ± .003 .414 ± .005 5/16 1/2-20 UNF-2B .454 .234 .550 .093 .960 .547 12° .625
3-906 .078 ± .003 .468 ± .005 3/8 9/16-18 .500 .297 .616 .097 .906 .609 12° .688
3-908 .087 ± .003 .644 ± .009 1/2 3/4-16 .562 .391 .811 .100 1.188 .688 15° .875
3-910 .097 ± .003 .755 ± .009 5/8 7/8-14 .656 .484 .942 .100 1.344 .781 15° 1.000
3-912 .116 ± .004 .924 ± .009 3/4 1 1/16-12 .750 .609 1.148 .130 1.625 .906 15° 1.250
3-913 .116 ± .004 .986 ± .010 13/16
3-914 .116 ± .004 1.047 ± .010 7/8 1 3/16-12 .750 .719 1.273 .130 1.765 .906 15° 1.375
3-916 .116 ± .004 1.171 ± .010 1 1 5/16-12 .750 .844 1.398 .130 1.910 .906 15° 1.500
UN-2B
3-918 .116 ± .004 1.355 ± .012 1 1/8
3-920 .118 ± .004 1.475 ± .014 1 1/4 1 5/8-12 .750 1.078 1.713 .132 2.270 .906 15° 1.875
3-924 .118 ± .004 1.720 ± .014 1 1/2 1 7/8-12 .750 1.312 1.962 .132 2.560 .906 15° 2.125
3-932 .118 ± .004 2.337 ± .018 2 2 1/2-12 .750 1.781 2.587 .132 3.480 .906 15° 2.750
Design Table 4-5: Boss Dimensions for Industrial Straight Thread Tube Fitting O-ring Gaskets Per SAE J1926

4-24 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook

For Static Vacuum Seal Glands

Male Gland Female Gland

½E

Static O-Ring Sealing

½E

Gland Detail
0° to 5°
Break Corners
(Typ.)
Approx. .005 Rad.
1/2E W W
16 .005
Typ.
R Gland
32

F L W W
32

16 Depth
I.D.
.003 Typ.
G
F Groove
Depth (Ref.) Section W-W

Finishes are RMS values

Refer to Design Chart 4-7 (below) for dimensions.

Design Chart Static Vacuum Seal Glands

O-Ring W L E G R
Size Cross-Section Gland Squeeze Diametral Groove Groove Max.*
AS568A- Nominal Actual Depth Actual % Clearance Width Radius Eccentricity
004 .050 .015 22 .002 .093 .005
.070
through 1/16 to to to to to to .002
±.003
050 .052 .023 32 .005 .098 .015
102 .081 .017 17 .002 .140 .005
.103
through 3/32 to to to to to to .002
±.003
178 .083 .025 24 .005 .145 .015
201 .111 .022 16 .003 .187 .010
.139
through 1/8 to to to to to to .003
±.004
284 .113 .032 23 .006 .192 .025
309 .170 .032 15 .003 .281 .020
.210
through 3/16 to to to to to to .004
±.005
395 .173 .045 21 .006 .286 .035
425 .226 .040 15 .004 .375 .020
.275
through 1/4 to to to to to to .005
±.006
475 .229 .055 20 .007 .380 .035
*Total indicator reading between groove and adjacent bearing surface.
Design Chart 4-7: Design Chart for Static Vacuum Seal Glands

Parker Hannifin Corporation • O-Ring Division 4-25

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
 < Back Section Contents Table of Contents Search Next >
Parker O-Ring Handbook
Static O-Ring Sealing

4-26 Parker Hannifin Corporation • O-Ring Division

2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com