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(Non-preferred) dimensions in parentheses.

Unit:mm

Square Nuts

JIS B 1163 - 1995

Display drawing:

日标JIS B1163 - 1995 JIS1163 1163JIS Square Nuts
Nominal Diameter
d
M3 M4 M5 M6 M8 M10 M12 (M14) M16 (M18) M20 (M22) M24
m Nominal Size
Grade A max
min
Grade B max
min
Grade C max
min
s max=nominal size
Grade A min
Grade B min
Grade C min
e ≈
2.4 3.2 4 5 6.5 8 10 11 13 15 16 18 19
2.4 3.2 4 5 6.5 8 10 11 13 15 16 18 19
2.15 2.9 3.7 4.7 6.14 7.64 9.64 10.57 12.57 14.57 15.57 17.57 18.48
2.4 3.2 4 5 6.5 8 10 11 13 15 16 18 19
2 2.72 3.52 4.52 5.92 7.42 9.42 10.3 12.3 14.3 15.3 17.3 18.16
- - - 5.6 7.3 8.8 10.8 11.9 13.9 15.9 16.9 18.9 20
- - - 4.4 5.7 7.2 9.2 10.1 12.1 14.1 15.1 17.1 18
5.5 7 8 10 13 17 19 22 24 27 30 32 36
5.3 6.8 7.8 9.8 12.75 16.75 18.65 21.65 23.65 26.65 29.65 31.6 35.6
5 6.4 7.4 9.4 12.3 16.3 18.2 21.2 23.2 26.2 29.2 31 35
- - - 9.4 12.3 16.3 18.2 21.2 23.2 26.2 29.2 31 35
7.8 9.9 11.3 14.1 18.4 24 26.9 31.1 33.9 38.2 42.4 45.3 50.9

Alternative history

JIS B 1163 - 1995 JIS B 1163 - 2001 JIS B 1163 - 2009
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