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Click Specification

(Non-preferred) dimensions in parentheses.

Same specifications, different dimensions for other parts.

Unit:mm

Hexagon Nuts, Style 2, Fine Thread [Table 4]

JIS B 1181 - 2004

Display drawing:

日标JIS B1181 - 2004 JIS1181 1181JIS Hexagon Nuts, Style 2, Fine Thread [Table 4]
Thread Size
D
M8 M10 (M10) M12 (M12) (M14) M16 (M18)
P Pitch
c max
min
da max
min
dw min
e min
m max
min
mw min
s max=nominal size
min
1 1 1.25 1.5 1.25 1.5 1.5 1.5
0.6 0.6 0.6 0.6 0.6 0.6 0.8 0.8
0.15 0.15 0.15 0.15 0.15 0.15 0.2 0.2
8.75 10.8 10.8 13 13 15.1 17.3 19.5
8 10 10 12 12 14 16 18
11.63 14.63 14.63 16.63 16.63 19.64 22.49 24.85
14.38 17.77 17.77 20.03 20.03 23.36 26.75 29.56
7.5 9.3 9.3 12 12 14.1 16.4 17.6
7.14 8.94 8.94 11.57 11.57 13.4 15.7 16.9
5.71 7.15 7.15 9.26 9.26 10.72 12.56 13.52
13 16 16 18 18 21 24 27
12.73 15.73 15.73 17.73 17.73 20.67 23.67 26.16
Thread Size
D
M20 (M20) (M22) M24 (M27) M30 (M33) M36
P Pitch
c max
min
da max
min
dw min
e min
m max
min
mw min
s max=nominal size
min
1.5 2 1.5 2 2 2 2 3
0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2
21.6 21.6 23.7 25.9 29.1 32.4 35.6 38.9
20 20 22 24 27 30 33 36
27.7 27.7 31.35 33.25 38 42.75 46.55 51.11
32.95 32.95 37.29 39.55 45.2 50.85 55.37 60.79
20.3 20.3 21.8 23.9 26.7 28.6 32.5 34.7
19 19 20.5 22.6 25.4 27.3 30.9 33.1
15.2 15.2 16.4 18.08 20.32 21.84 24.72 26.48
30 30 34 36 41 46 50 55
29.16 29.16 33 35 40 45 49 53.8
①,Grade A：M8~M16；Grade B：M18~M36

Alternative history

JIS B 1181 - 1993 JIS B 1181 - 2004 JIS B 1181 - 2014
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