HARDLOCK Nut Standard Rim

Dimensions in millimeters (mm)

M6 – M30

M30~

Nominal Size Pitch Thickness Width across flats e Overall height Unit Weight Recommended tightening torque for Concave nut (N -m)
For all materials (Min – Max)
Convex nut Concave nut
P m m1 s l (g)
d Coarse Fine Basic Tolerance Basic Tolerance Basic Tolerance approx. approx. approx.
M6 1.0 0.75 5 ±0.48 5 ±0.48 10 0
-0.6		 11.5 9.2 3.3 4 – 5
M8 1.25 1.0 6.5 ±0.58 6.5 ±0.58 13 0
-0.7		 15.0 12.0 8.6 9 – 13
M10 1.5 1.25 8 ±0.58 8 ±0.58 17 0
-0.7		 19.6 14.4 17.6 18 – 24
M12 1.75 1.25 10 ±0.58 10 ±0.58 19 0
-0.8		 21.9 17.9 27.3 27 – 39
M14 2.0 1.5 11 ±0.7 11 ±0.7 22 0
-0.8		 25.4 19.9 39 40 – 58
M16 2.0 1.5 13 ±0.9 12 ±1.0 24 0
-0.8		 27.7 23.2 52.8 70 – 100
M18 2.5 1.5 15 ±0.9 14 ±1.0 27 0
-0.8		 31.2 26.7 80 100 – 150
M20 2.5 1.5 16 ±0.9 15 ±1.0 30 0
-0.8		 34.6 28.2 105 120 – 200
M22 2.5 1.5 18 ±0.9 17 ±1.0 32 0
-1		 37.0 32.3 130 150 – 250
M24 3.0 2.0 19 ±0.9 18 ±1.0 36 0
-1		 41.6 33.9 180 160 – 300
M27 3.0 2.0 21 ±1.0 21 ±1.0 41 0
-1		 47.3 37.9 246 250 – 390
M30 3.5 2.0 23 ±1.0 23 ±1.0 46 0
-1		 53.1 41.9 375 270 – 440
M33 3.5 2.0 25 ±1.0 20 0
-1.5		 50 0
-1		 57.7 39.4 411 290 – 490
M36 4.0 3.0 28 ±1.0 21 0
-1.5		 55 0
-1.2		 63.5 41.9 532 340 – 590
M39 4.0 3.0 30 ±1.2 23 0
-1.5		 60 0
-1.2		 69.3 45.7 681 390 – 640
M42 4.5 4.0 33 ±1.2 25 0
-1.5		 65 0
-1.2		 75.0 50.2 892 440 – 690
M45 4.5 4.0 35 ±1.2 27 0
-1.5		 70 0
-1.2		 80.8 54.2 1115 490 – 740
M48 5.0 4.0 37 ±1.2 29 0
-1.5		 75 0
-1.2		 86.5 58.2 1393 540 – 780
M52 5.0 4.0 41 ±1.2 31 0
-1.5		 80 0
-1.2		 92.4 63.7 1708 590 – 930
M56 5.5 4.0 44 ±1.2 34 0
-1.5		 85 0
-1.4		 98.1 68.7 2047 640~880
M64 6.0 4.0 50 ±1.5 38 0
-1.5		 95 0
-1.4		 110.0 77.0 2795 690~930

– External dimensions : JIS B1181(2004) / ISO 4032 (Width across flats only)
– Threads screw tolerances : JIS B0209(2001) / ISO 965 6H
– The overall height has been changed to the approx. maximum height including considerable tolerances since Jan. 2014.
– S45C is used in the concave nut with rim of Class10.
– Class4 with HDZ35, Class8, Class10 are available in over M8.
– Fine threads are available in Basic type.
– M20 – M30 in A2(SUS304 equiv.) are avaialble in Basic type because their rim types are currently under development .
– Please be advised that the dimentions or specifications may be subject to change without notice.