Special Thin Type: Dimension and tightening torque table

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Standard materials and coatings

Material Coating
Medium-carbon steel (JIS S45C) Manganese Phosphate coating

Please contact us for other materials and/or coatings.

Dimension and tightening torque table (M20–M100)

Unit: millimeters (mm)

Nominal size Pitch Convex nut (1) Concave nut (2) Common to 1, 2 Overall height (approx.) Bottom surface squarness (max.) Tightening torque (N·m)
(all materials, strengths)
d P D B1 b D1 D2 B S g
Basic Tolerance Basic Tolerance Basic Tolerance Basic (approx.) Basic Tolerance Convex nut Concave nut
(recommended)
M20 1.0 32 0
-0.5
6 0
-0.5
3.5 32 0
-0.5
26 6 0
-0.5
4 28 9.5 0.07 * 55
M25 1.5 38 0
-0.5
7 0
-0.5
3 38 0
-0.5
32 7 0
-0.5
5 34 10 * 80
M30 1.5 45 0
-0.5
7 0
-0.5
3 45 0
-0.5
38 7 0
-0.5
5 41 10 * 115
M35 1.5 52 0
-0.5
8 0
-0.5
4 52 0
-0.5
44 8 0
-0.5
5 48 12 * 130
M40 1.5 58 0
-0.5
9 0
-0.5
5 58 0
-0.5
50 9 0
-0.5
6 53 14 * 155
M45 1.5 65 0
-0.5
10 0
-0.5
6 65 0
-0.5
56 10 0
-0.5
6 60 16 * 170
M50 1.5 70 0
-0.5
11 0
-0.5
7 70 0
-0.5
61 11 0
-0.5
6 65 18 * 200
M55 2.0 75 0
-0.5
11 0
-0.5
6 75 0
-0.5
67 11 0
-0.5
7 69 17 * 210
M60 2.0 80 0
-0.5
11 0
-0.5
6 80 0
-0.5
73 11 0
-0.5
7 74 17 * 240
M65 2.0 85 0
-0.5
10 0
-0.5
5 85 0
-0.5
79 10 0
-0.5
7 79 15 * 255
M70 2.0 92 0
-0.5
10 0
-0.5
5 92 0
-0.5
85 10 0
-0.5
8 85 15 * 270
M75 2.0 98 0
-0.5
11 0
-0.5
6 98 0
-0.5
90 11 0
-0.5
8 91 17 * 300
M80 2.0 105 0
-0.5
12.5 0
-0.5
7.5 105 0
-0.5
95 12.5 0
-0.5
8 98 20 * 310
M85 2.0 110 0
-0.5
13.5 0
-0.5
8.5 110 0
-0.5
102 13.5 0
-0.5
8 103 22 * 340
M90 2.0 120 0
-0.5
13.5 0
-0.5
8.5 120 0
-0.5
108 13.5 0
-0.5
10 112 22 * 350
M95 2.0 125 0
-0.5
14 0
-0.5
9 125 0
-0.5
113 14 0
-0.5
10 117 23 * 380
M100 2.0 130 0
-0.5
15 0
-0.5
10 130 0
-0.5
120 15 0
-0.5
10 122 25 * 390

• External dimensions: JIS B1554(2005)/ISO 2982
• Screw thread tolerances: JIS B0209(2001)/ISO 965 6H
• Please consult with us on the availability of the thin type of HLB Hardlock Bearing Nuts in sizes M105 and larger.
• Be advised that the dimensions and other specifications are subject to change without notice.

Notes for the thin type of HLB

• Install the convex nut first.
• Do not tighten with a screwdriver or a chisel.
• Refrain from use where it will be subjected to heavy loads.
• Stop using immediately if there is a crack.
The nut will not deform or break due to rotary or other stress, but cracks or breakage may appear under repeated loads. For conditions with repeated loads, refrain from use or switch to the standard type.
Take care when tightening or loosening the convex nut because dimension B is very thin.