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The globally recognized HARDLOCK Set Screw (HLS)

HARDLOCK SET SCREW

HLS-A Standard Normal type HLS-B Standard Hollow type

HLS-C Pin Normal type HLS-D Pin Hollow type

■ ADVANTAGES
◆ The self-locking effect remains even in the most severe environments.
◆ All metal with little abrasion enables repeated reuse.
◆ Simple and fast installation.
◆ Significant cost reduction.

■ MAINTENANCE-FREE WITH EXTRAORDINARY LOCKING PERFORMANCE

The HARDLOCK Set Screw (HLS) is a revolutionary self-locking set
screw (Hexagon socket head set screw) which applies the “Wedge
2 2
Principle” and delivers superior self-locking effect like the other
HARDLOCK products. By combining the concave set screw 1 with its
concentric conical recess and the convex set screw 2 designed with
1 1 an eccentric protrusion, due to the wedge principle, they will lock
themselves in the direction perpendicular to the axis.

to lock shaft collars

to fix a core pin for die

casting/molding dies

■ INSTALLATION PROCEDURE
1 2 3 4

1 Tighten the concave set screw first.

2 Use a general tightening tool (L-wrench or the like).
3 Tighten the convex (lock) screw by the specified torque or by 1 turn (360 degrees) after prevailing torque is
generated (When the protrusion and recess come into contact.).
4 Installation Complete.
■ DIMENSION AND TIGHTENING TORQUE TABLE

STANDARD - NORMAL TYPE 1

HLS-A (aka HLS or HLS-S)

Size Materials Plating
M8 - M20 Property Class 45H Black Oxide
Surface Hardness 45 - 53HRC
M22 - M36 Property Class 33H Black Oxide
Surface Hardness 33 - 44HRC

Overall Reference
Nominal Set screw (1) Lock screw (2) Hexagon socket Unit tightening Proof
Pitch height
size (Concave) (Convex) Common to (1) (2) weight torque (Nm) torque
(Approx.)
*Common to (Nm)
S, S1 Coarse Fine H Tolerance t1 H1 Tolerance t2 l B Tolerance (g) (1) & (2)
M8 1.25 - 10 ±0.29 ≧2.5 10 ±0.29 ≧5 17.5 4 +0.02 / +0.10 4 9～10 16
M10 1.5 - 12 ±0.35 ≧3 12 ±0.35 ≧6 21 5 +0.02 / +0.14 8 17～20 30
M12 1.75 1.5 16 ±0.35 ≧5 16 ±0.35 ≧8 29 6 +0.02 / +0.14 16 29～34 52
M14 2 1.5 16 ±0.35 ≧4 16 ±0.35 ≧8 28 6 +0.02 / +0.14 22 29～34 52
M16 2 1.5 20 ±0.42 ≧6 20 ±0.42 ≧10 36 8 +0.03 / +0.18 37 66～78 120
M18 2.5 1.5 20 ±0.42 ≧6 20 ±0.42 ≧10 36 8 +0.03 / +0.18 47 66～78 120
M20 2.5 1.5 20 ±0.42 ≧7 20 ±0.42 ≧12 35 10 +0.03 / +0.18 52 121～143 220
M22 2.5 1.5 25 ±0.42 ≧10 25 ±0.42 ≧15 45 12 +0.03 / +0.18 79 204～241 370
M24 3 1.5 25 ±0.42 ≧9 25 ±0.42 ≧15 44 12 +0.05 / +0.23 95 204～241 370
M30 3.5 1.5 30 ±0.42 ≧9 30 ±0.42 ≧15 54 17 +0.05 / +0.23 161 539～637 980
M36 4 1.5 35 ±0.5 ≧8 35 ±0.5 ≧15 63 17 +0.05 / +0.23 368 539～637 980

STANDARD - HOLLOW TYPE

HLS-B (aka HLS-T or HLS-H)

Size Materials Plating

M12 - M36 Property Class 33H Black Oxide
Surface Hardness 33 - 44HRC

Overall Reference
Nominal Set screw (1) Lock screw (2) Hexagon socket Unit tightening Proof
Pitch height Hole dia.
size (Concave) (Convex) Common to (1) (2) weight torque (Nm) torque
(Approx.)
*Common to (Nm)
S, S1 Coarse Fine H Tolerance t1 H1 Tolerance t2 l B Tolerance A, A1 Tolerance (g) (1) & (2)
M12 1.75 16 ±0.35 ≧2 16 ±0.35 ≧5 29 6 +0.02 / +0.14 6 ±0.2 13 29 ～34 52
M14 2 1.5 16 ±0.35 ≧2 16 ±0.35 ≧6 28 6 +0.02 / +0.14 6 ±0.2 18 29～34 52
M16 2 1.5 20 ±0.42 ≧4 20 ±0.42 ≧8 36 8 +0.03 / +0.18 8 ±0.2 29 66～78 120
M20 2.5 1.5 20 ±0.42 ≧5 20 ±0.42 ≧10 35 10 +0.03 / +0.18 10 ±0.2 44 121～143 220
M24 3 1.5 25 ±0.42 ≧6 25 ±0.42 ≧12 44 12 +0.05 / +0.23 12 ±0.2 81 204～241 370
M30 3.5 1.5 30 ±0.42 ≧9 30 ±0.42 ≧15 54 17 +0.05 / +0.23 17 ±0.2 134 539～637 980
M36 4 1.5 35 ±0.5 ≧8 35 ±0.5 ≧15 63 17 +0.05 / +0.23 17 ±0.2 293 539～637 980

• External dimensions: JIS B1177(2007) / ISO4026

• Threads tolerance: Class 6g JIS B0209(2001) / ISO965
• Reference tightening torque is calculated by multiplying 0.6 plus or minus 5% of the proof torque of hexagonal wrenches
stipulated in JIS B4648 (ISO2936).
 ■ DIMENSION AND TIGHTENING TORQUE TABLE

PIN - NORMAL TYPE

HLS-C (aka HLS-P)
Size Materials Plating
M12 - M36 Property Class 33H Black
Surface Hardness 33 - 44HRC Oxide

Reference
Hexagonal socket tightening
Set Screw (1) Lock Screw (2) Thread Unit Proof
Size Pitch *Common to Pin dia. torque
L (Concave) (Convex) length weight torque
(1) &(2) *Common to
(Nm)
(1)&(2)
S, S1 Coarse Fine H Tolerance t1 H1 Tolerance t2 l B Tolerance A, A1 Tolerance (g) (Nm)
100 +0.02 0 53
M12 1.75 1.5 15 ±0.35 ≧4 16 ±0.35 12 28 6 8 29～34 52
200 +0.14 - 0.2 92
100 123
1.5 +0.03 0
M16 2 200 20 ±0.42 ≧6 20 ±0.42 12 36 8 12 212 66～78 120
+0.18 - 0.2
- 250 257
100 217
1.5
200 +0.03 0 374
M20 2.5 25 ±0.42 ≧6 20 ±0.42 12 40 10 16 121～143 220
250 +0.18 - 0.2 453
-
300 531
100 369
1.5
200 +0.05 0 613
M24 3 35 ±0.42 ≧7 25 ±0.42 15 54 12 20 204～241 370
250 +0.23 - 0.2 735
-
300 857
100 570
1.5 +0.05 0
M30 3.5 200 40 ±0.42 ≧7 30 ±0.42 20 64 17 24 922 539～637 980
+0.23 - 0.2
- 250 1,098
100 +0.05 0 948
M36 4 1.5 40 ±0.5 ≧7 35 ±0.5 20 68 17 30 539～637 980
200 +0.23 - 0.2 1,501

PIN - HOLLOW TYPE

HLS-D (aka HLS-TP or HLS-PH)

Size Materials Plating

M14 - M36 Property Class 33H Black
Surface Hardness 33 - 44HRC Oxide

Hexagonal Reference
Unit
Set Screw(1) Lock Screw(2) Thread socket tightening
Size Pitch length *Common to
Pin dia. Pin hole dia. weigh Proof
(Concave) (Convex) torque
L t Torque
(1)&(2) *Common to
(Nm)
(1)&(2)
S, S1 Coarse Fine H Tolerance t1 H1 Tolerance t2 l B Tolerance D Tolerance A,A1 Tolerance (g)
(Nm)
+0.02 0
M14 2 1.5 100 20 ±0.42 ≧5 16 ±0.35 9 32 6 10 6 ±0.2 59 29～34 52
+0.14 -0.2
1.5 100 +0.03 0 87
M16 2 20 ±0.42 ≧6 20 ±0.42 12 36 8 12 7 ±0.2 66～78 120
- 200 +0.18 -0.2 146
1.5 100 +0.03 0 145
M20 2.5 25 ±0.42 ≧6 20 ±0.42 12 40 10 16 10 ±0.2 121～143 220
- 200 +0.18 -0.2 239
1.5 100 +0.05 0 224
M24 3 35 ±0.42 ≧7 25 ±0.42 15 54 12 20 12 ±0.2 204～241 370
- 200 +0.23 -0.2 345
100 +0.05 0 348
M30 3.5 - 40 ±0.42 ≧7 30 ±0.42 20 64 17 24 17 ±0.2 539～637 980
200 +0.23 -0.2 507
100 +0.05 0 703
M36 4 - 40 ±0.5 ≧7 35 ±0.5 20 68 17 30 17 ±0.2 539～637 980
200 +0.23 -0.2 1060

• External dimensions: JIS B1177(2007) / ISO4026

• Threads tolerance: Class 6g JIS B0209(2001) / ISO965
• Reference tightening torque is calculated by multiplying 0.6 plus or minus 5% of the proof torque of hexagonal wrenches
stipulated in JIS B4648 (ISO2936).
 Materials of HARDLOCK Set Screw
Pitch Material
Type Size
Coarse Fine Concave Convex
HARDLOCK Set Screw Standard M8 1.25 JIS SCM435 JIS SCM435
HLS-A (HLS) M10 1.5 JIS SCM435 JIS SCM435
1.75 JIS SCM435 JIS SCM435
M12
1.5 JIS S45C JIS S45C
2.0 JIS SCM435 JIS SCM435
M14
1.5 JIS S45C JIS S45C
2.0 JIS SCM435 JIS SCM435
M16
1.5 JIS S45C JIS S45C
2.5 JIS SCM435 JIS SCM435
M18
1.5 JIS S45C JIS S45C
2.5 JIS SCM435 JIS SCM435
M20
1.5 JIS S45C JIS S45C
M22 2.5 1.5 JIS S45C JIS S45C
M24 3.0 1.5 JIS S45C JIS S45C
M30 3.5 1.5 JIS S45C JIS S45C
M36 4.0 1.5 JIS S45C JIS S45C
HARDLOCK Set Screw Standard Hollow M12 1.8 JIS S45C JIS S45C
HLS-B (HLS-T) M14 2.0 1.5 JIS S45C JIS S45C
M16 2.0 1.5 JIS S45C JIS S45C
M20 2.5 1.5 JIS S45C JIS S45C
M24 3.0 1.5 JIS S45C JIS S45C
M30 3.5 1.5 JIS S45C JIS S45C
M36 4.0 1.5 JIS S45C JIS S45C
HARDLOCK Set Screw Pin 1.75 JIS S45C JIS SCM435
M12
HLS-C (HLS-P) 1.5 JIS S45C JIS S45C
2.0 JIS S45C JIS SCM435
M16
1.5 JIS S45C JIS S45C
2.5 JIS S45C JIS SCM435
M20
1.5 JIS S45C JIS S45C
M24 3.0 1.5 JIS S45C JIS S45C
M30 3.5 1.5 JIS S45C JIS S45C
M36 4.0 1.5 JIS S45C JIS S45C
HARDLOCK Set Screw Pin Hollow M14 2.0 1.5 JIS S45C JIS S45C
HLS-D (HLS-TP) M16 2.0 1.5 JIS S45C JIS S45C
M20 2.5 1.5 JIS S45C JIS S45C
M24 3.0 1.5 JIS S45C JIS S45C
M30 3.5 JIS S45C JIS S45C
M36 4.0 JIS S45C JIS S45C
These materials are subject to change without notice due to the availability of material screw.

1-6-24, Kawamata, Higashi Osaka,

Osaka, Japan 577-0063
Tel: +81 6 6784 1131
Fax: +81 6 6784 1161
e-mail: h.office@hardlock.co.jp
https://www.hardlock.co.jp/en/
No.5089-ISO9001