SURFACE J1926-1

REV.
OCT2006
VEHICLE Issued 1988-08
STANDARD Revised 2006-10

Superseding J1926-1 MAR1993

Connections for General Use and Fluid Power—Ports and Stud Ends with ASME B1.1 Threads
and O-Ring Sealing—Part 1: Threaded Port with O-Ring Seal in Truncated Housing

RATIONALE

SAE J1926-1 covers the requirements for inch O-Ring ports formerly covered in SAE J514. They have been moved out
of SAE J514 for more flexibility when used with multiple connector systems. The design parameters are the same and
remain unchanged except for conversion to metric dimensions and in some rounding.

FOREWORD

SAE J1926 consists of the following parts, under the general title:

Connections for general use and fluid power Ports and stud ends with ASME B1.1 threads and O-ring sealing:

— Part 1: Port with O-Ring Seal in Truncated Housing

— Part 2: Heavy-Duty (S Series) Stud Ends
— Part 3: Light-Duty (L Series) Stud Ends

These standards define performance requirements, dimensions, and designs for port and stud end connections for
heavy-duty in Part 2 and light-duty in Part 3. Significant testing through 40 years of use has confirmed the performance
requirements of these ports and stud ends.

In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pressure within an
enclosed circuit. In general applications, a fluid may be conveyed under pressure. Components are connected through
their threaded ports by fluid conductor fittings to tubes and pipes, or to hose fittings and hoses.

Ports are an integral part of fluid power components such as pumps, motors, valves, cylinders, etc.

1. SCOPE

This part of SAE J1926 specifies dimensions for fluid power and general use ports with inch threads to ASME B1.1 for
use with adjustable and nonadjustable stud ends shown in SAE J1926-2 and SAE J1926-3.

Ports in accordance with this part of SAE J1926 may be used at working pressures up to 63 MPa for nonadjustable stud
ends up to 40 MPa for adjustable stud ends. The permissible working pressure depends upon materials, design, working
conditions, application, etc.

For threaded ports and stud ends specified in new designs for hydraulic fluid power applications, only SAE J2244 shall be
used. Threaded ports and stud ends in accordance with ISO 1179, ISO 9974, and ISO 11926 shall not be used for new
design in hydraulic fluid power applications.

Appendix A of this document is informative.

__________________________________________________________________________________________________________________________________________
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Copyright © 2006 SAE International
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SAE J1926-1 Revised OCT2006 -2-

2. REFERENCES

2.1 Applicable Publications

The following standards contain provisions which, through reference in this text, constitute provisions of this document.
At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to
agreements based on this document are encouraged to investigate the possibility of applying the most recent edition of
the standards indicated as follows. Members of IEC and ISO maintain registers of currently valid International Standards.

2.1.1 SAE Publications

Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and
Canada) or 724-776-4970 (outside USA), www.sae.org.

SAE J514 Hydraulic Tube Fittings

SAE J1453 Fitting—O-ring Face Seal

SAE J1644 Metallic Tube Connections for Fluid Power and General Use—Test Methods for Threaded Hydraulic Fluid
Power Connectors

SAE J2244-1 Connections for Fluid Power and General Use—Parts and Stud Ends with ISO 261 Threads and O-ring
Sealing—Part 1: Port with O-ring Seal in Truncated Housing

2.1.2 ISO Publications

Available from ANSI, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.

ISO 263:1973 ISO inch screw threads—General plan and selection for screws, bolts and nuts—Diameter range 0,06 to
6 in

ISO 1101:1983 Technical drawings—Tolerancing of form, orientation, location and run-out—Generalities, definitions,
symbols, indications on drawings

ISO 1302:1978 Technical drawings—Method of indicating surface texture on drawings

2.1.3 ASME Publications

Available from the American Society of Mechanical Engineers, 22 Law Drive, PO Box 2900, Fairfield, NJ 07007-2900, Tel:
973-882-1170, www.asme.org.

ASME B1.1 Unified Inch Screw Threads (UN and UNR Thread Form)

2.2 Related Publications

The following publications are provided for information purposes only and are not a required part of this document.
SAE J1926-1 Revised OCT2006 -3-

2.2.1 ISO Publications

Available from ANSI, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.

ISO 1179-11 Connections for general use and fluid power—Ports and stud ends with ISO 228-1 threads with
elastomeric and metal-to-metal sealing—Part 1: Threaded port

ISO 1179-21 Connections for general use and fluid power—Ports and stud ends with ISO 228-1 threads with
elastomeric and metal-to-metal sealing—Part 2: Heavy duty (S series) and light duty (L series) stud
ends with elastomeric sealing (type E)

ISO 1179-31 Connections for general use and fluid power—Ports and stud ends with ISO 228-1 threads with
elastomeric and metal-to-metal sealing—Part 3: Light duty (L series) stud end with sealing by O-ring
with retaining ring (types G and H)

ISO 1179-41 Connections for general use and fluid power—Ports and stud ends with ISO 228-1 threads with
elastomeric and metal-to-metal sealing—Part 4: Stud end for general use only with metal-to-metal
sealing (type B)

ISO 2306:1972 Drills for use prior to tapping screw threads

ISO 5598:1985 Fluid power systems and components—Vocabulary

ISO 6149-1:1993 Connections for fluid power and general use—Ports and stud ends with ISO 261 threads and O-ring
sealing—Part 1: Port with O-ring seal in truncated housing

ISO 6149-2:1993 Connections for fluid power and general use—Ports and stud ends with ISO 261 threads and O-ring
sealing—Part 2: Heavy duty (S series) stud ends—Dimensions, design, test methods and
requirements

ISO 6149-3:1993 Connections for fluid power and general use—Ports and stud ends with ISO 261 threads and O-ring
sealing—Part 3: Light duty (L series) stud ends—Dimensions, design, test methods and
requirements

ISO 8434-21 Metallic tube fittings for fluid power and general use—Part 2: 37° flared fittings

ISO 9974-1:1996 Connections for general use and fluid power—Ports and stud ends with ISO 261 threads with
elastomeric and metal-to-metal sealing—Part 1: Threaded port

ISO 9974-21 Connections for general use and fluid power—Ports and stud ends with ISO 261 threads with
elastomeric and metal-to-metal sealing—Part 2: Stud end with elastomeric sealing (type E)

ISO 9974-31 Connections for general use and fluid power—Ports and stud ends with ISO 261 threads with
elastomeric and metal-to-metal sealing—Part 3: Stud end with metal-to-metal sealing (type B)

ISO 11926-1:1995 Connections for general use and fluid power—Ports and stud ends with ISO 261 threads and O-ring
sealing—Part 1: Threaded port with O-ring seal in truncated housing

ISO 11926-2:1995 Connections for general use and fluid power—Ports and stud ends with ISO 261 threads and O-ring
sealing—Part 2: Heavy duty (S series) stud ends

ISO 11926-3:1995 Connections for general use and fluid power—Ports and stud ends with ISO 261 threads and O-ring
sealing—Part 3: Light duty (L series) stud ends

1
To be published.
SAE J1926-1 Revised OCT2006 -4-

3. DEFINITIONS

For the purpose of this part of SAE J1926, the definitions given in ISO 5598 shall apply.

4. PORT SIZE

The ports shall be specified by SAE J1926-1 and the thread size (without UNF or UN and 2B designation), separated by a
colon, for example SAE J1926-1:1/2-20.

5. DIMENSIONAL REQUIREMENTS

Ports shall conform to the dimensions in Figure 1 and Table 1.

6. TEST METHODS

Ports shall be tested along with stud ends per the test methods and requirements in SAE J1644.

7. IDENTIFICATION STATEMENT

Use the following statement in test reports, catalogues, and sales literature when electing to comply with this part of SAE
J1926:

Port conforms to SAE J1926-1, Connections for fluid power and general use—Ports and stud ends with ASME B1.1
threads and O-ring sealing—Part 1: Threaded port with O-ring seal in truncated housing.

FIGURE 1 - SAE J1926-1 PORT DETAIL

SAE J1926-1 Revised OCT2006 -5-

TABLE 1 - SAE J1926-1 PORT DIMENSIONS

Nominal Tube Nominal Tube Nominal Tube Nominal Tube

OD or Hose ID OD or Hose ID OD or Hose ID OD or Hose ID
Inch Inch Inch Metric d1 L4
(2) (3) (4)
Tubing Tubing Tubing Tubing Thread d3 d4 d5 L1 L2 L3 Min Full z°
(1)
Dash Size mm in mm Size, in d2 Ref Min ± 0.05 ± 0.2 Min Max Thread ± 1°

–2 3.18 0.125 4 5/16-24 UNF-2B 17 1.6 11 9.15 2.1 12 1.6 10 12°

–3 4.76 0.188 5 3/8-24 UNF-2B 19 3.5 13 10.75 2.1 12 1.6 10 12°

–4 6.35 0.250 6 7/16-20 UNF-2B 21 4.5 15 12.45 2.6 14 1.6 11.5 12°

–5 7.94 0.312 8 1/2-20 UNF-2B 23 6 16 14.05 2.6 14 1.6 11.5 12°

–6 9.52 0.375 10 9/16-18 UNF-2B 25 7.5 18 15.70 2.7 15.5 1.6 12.7 12°

–8 12.70 0.500 12 3/4-16 UNF-2B 30 10 22 20.65 2.7 17.5 2.4 14.3 15°

–10 15.88 0.625 16 7/8-14 UNF-2B 34 12.5 26 24 2.7 20 2.4 16.7 15°

–12 19.05 0.750 20 1-1/16-12 UN-2B 41 16 32 29.2 3.5 23 2.4 19 15°

–14 22.22 0.875 22 1-3/16-12 UN-2B 45 18 35 32.4 3.5 23 2.4 19 15°

–16 25.40 1.000 25 1-5/16-12 UN-2B 49 21 38 35.55 3.5 23 3.2 19 15°

–20 31.75 1.250 30 1-5/8-12 UN-2B 58 27 48 43.55 3.5 23 3.2 19 15°

–24 38.10 1.500 38 1-7/8-12 UN-2B 65 33 54 49.9 3.5 23 3.2 19 15°

–32 50.80 2.000 50 2-1/2-12 UN-2B 88 45 70 65.75 3.5 23 3.2 19 15°

1. If face of port is on a machined surface, dimensions d2 and L3 need not apply as long as R 0.2/0.1 is maintained to avoid damage to the O-ring during installation.
2. Reference only, connecting hole application may require a different size.
3. Tap drill depths given require use of a bottoming tap to produce the specified full thread lengths. Where standard taps are used, increase tap drill depths accordingly.
4. Maximum recommended spotface depth to permit sufficient wrench grip for proper tightening of the fitting or locknut.

8. NOTES

8.1 Key Words

Fluid power, pipe fittings, standard connection, standard coupling, pipe joints, ports, stud ends, specifications, design,
operating requirements, dimensions, designation, test methods, inch, straight thread, O-ring seal, high pressure.

8.2 Marginal Indicia

The change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions
have been made to the previous issue of the report. An (R) symbol to the left of the document title indicates a complete
revision of the report.

PREPARED BY THE SAE FLUID CONDUCTORS AND CONNECTORS TECHNICAL

COMMITTEE SC1—AUTOMOTIVE AND HYDRAULIC TUBE FITTING
SAE J1926-1 Revised OCT2006 -6-

APPENDIX A - METRIC NUMBERS CONVERTED TO INCH DIMENSIONS

FIGURE A1 - METRIC NUMBERS CONVERTED TO INCH DIMENSIONS