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Click Specification

(Non-preferred) dimensions in parentheses.

Unit:mm

Self-locking Nuts, Reduced Hexagon Oblate

GB /T 1338 - 1988

Display drawing:

国标GB /T1338 - 1988 GB1338 1338GB Self-locking Nuts, Reduced Hexagon Oblate
Screw Thread
d
M8 M10 M12 (M14) M16 (M18) M20 (M22) M24
P Pitch
ds max
min
h Nominal Size
max
min
k Nominal Size
max
min
s max
min
1.25 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
9 11 13.2 15.5 17.6 19.6 21.6 23.7 25.7
8.9 10.9 13.1 15.4 17.5 19.5 21.5 23.6 25.6
7 8 10 10 12 12 13 15 16
7.18 8.18 10.18 10.18 12.22 12.22 13.22 15.22 16.22
6.82 7.82 9.82 9.82 11.78 11.78 12.78 14.78 15.78
3 3.5 4.5 5 6 6.5 7 7.5 8
3.13 3.65 4.65 5.15 6.15 6.68 7.18 7.68 8.18
2.87 3.35 4.35 4.85 5.85 6.32 6.82 7.32 7.82
12 14 17 19 22 24 27 30 32
11.73 13.73 16.73 18.67 21.67 23.67 26.67 29.67 31.61
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