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Unit:mm

Small hexagon nuts, finished, [Table JA.15]

JIS B 1181 - 2014

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日标JIS B1181 - 2014 JIS1181 1181JIS Small hexagon nuts, finished, [Table JA.15]
Thread Size
d
M8 M10 M12 (M14) M16 (M18) M20 (M22) M24 (M27) M30 (M33) M36 (M39)
P Pitch Coarse pitch
Fine pitch
m max
min
m1 max
min
s max
min
e ≈
da ≈
dw min
c ≈
1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.5 3.5 4 4
1 1.25 1.25 1.5 1.5 1.5 1.5 1.5 2 2 2 2 3 3
6.5 8 10 11 13 15 16 18 19 22 24 26 29 31
6.14 7.64 9.64 10.57 12.57 14.57 15.57 17.57 18.48 21.48 23.48 25.48 28.48 30.38
5 6 7 8 10 11 12 13 14 16 18 20 21 23
4.7 5.7 6.64 7.64 9.64 10.57 11.57 12.57 13.57 15.57 17.57 19.48 20.48 22.48
12 14 17 19 22 24 27 30 32 36 41 46 50 55
11.75 13.75 16.75 18.65 21.65 23.65 26.65 29.65 31.6 35.6 40.6 45.6 49.6 54.55
13.9 16.2 19.6 21.9 25.4 27.7 31.2 34.6 37 41.6 47.3 53.1 57.7 63.5
11.5 13.5 16.5 18 21 23 26 29 31 34 39 44 48 53
10.8 12.6 15.8 17.6 20.4 22.3 25.6 28.5 30.4 - - - - -
0.4 0.4 0.6 0.6 0.6 0.6 0.6 0.6 0.6 - - - - -

Alternative history

JIS B 1181 - 1993 JIS B 1181 - 2014
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