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Click Specification

(Non-preferred) dimensions in parentheses.

Same specifications, different dimensions for other parts.

Unit:mm

Metric Slotted Hex Nuts (ASTM A563M / F467M)

ANSI B 18.2.4.3M - 1979 (R2017)

Display drawing:

美标ANSI B18.2.4.3M - 1979 (R2017) ANSI18. Metric Slotted Hex Nuts (ASTM A563M / F467M)
Thread Size
d
M5 M6 M8 M10 (M10) ② M12 M14 M16 M20 M24 M30 M36
P Pitch
s max
min
e max
min
m max
min
n max
min
w max
min
c ① max
min
dw min
0.8 1 1.25 1.5 1.5 1.75 2 2 2.5 3 3.5 4
8.00 10.00 13.00 16.00 15.00 18.00 21.00 24.00 30.00 36.00 46.00 55.00
7.78 9.78 12.73 15.73 14.73 17.73 20.67 23.67 29.16 35.00 45.00 53.80
9.24 11.55 15.01 18.48 17.32 20.78 24.25 27.71 34.64 41.57 53.12 63.51
8.79 11.05 14.38 17.77 16.64 20.03 23.35 26.75 32.95 39.55 50.85 60.79
5.10 5.70 7.50 9.30 10.0 12.00 14.10 16.40 20.30 23.90 28.60 34.70
4.80 5.40 7.14 8.94 9.6 11.57 13.40 15.70 19.00 22.60 27.30 33.10
2.0 2.4 2.9 3.4 3.4 4.0 4.3 5.3 5.7 6.7 8.5 8.5
1.4 1.8 2.3 2.8 2.8 3.2 3.5 4.5 4.5 5.5 7.0 7.0
3.2 3.5 4.4 5.2 5.7 7.3 8.6 9.9 13.3 15.4 18.1 23.7
2.9 3.2 4.1 4.9 5.4 6.9 8 9.3 12.2 14.3 16.8 22.4
- - - - 0.6 - - - 0.8 0.8 0.8 0.8
- - - - 0.3 - - - 0.4 0.4 0.4 0.4
6.9 8.9 11.6 14.6 13.6 16.6 19.6 22.5 27.7 33.2 42.7 51.1
①,M16 and smaller nuts shall have a chamfered bearing surface. M20 and larger nuts, at the manufacturer's option, shall either have a chamfered or a washer faced bearing surface.
②,M10 nuts with 15 mm width across flats are currently being produced and used in U.S.A. and many other countries of the world. This size, however, is not an ISO standard. Unless M10 nuts with 15 mm width across flats are specifically ordered, M10 nuts with 16 mm width across flats shall be furnished.

Alternative history

ANSI/ASME B 18.2.4.3M - 1979 ANSI/ASME B 18.2.4.3M - 1995 ANSI/ASME B 18.2.4.3M - 2006
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