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(Non-preferred) dimensions in parentheses.

Cup Square Neck Bolts With Short Neck - Product Grade C

GB 801 - 1988

Display drawing:

国标GB 801 - 1988 GB801 801GB Cup Square Neck Bolts With Short Neck - Product Grade C

 *Models with different eras.

Nominal Length L Tips:seclect Nominal Length L and get Thread length.
Screw Thread
d
M6 M8 M10 M12
P Pitch
b
dk max
min
k1 max
min
k max
min
s max
min
1 1.25 1.5 1.75
18 22 26 30
13.1 17.1 21.3 25.3
11.3 15.3 19.16 23.16
3.4 3.4 4.4 5.4
2.6 2.6 3.6 4.6
4.08 5.28 6.48 8.9
3.2 4.4 5.6 7.55
6.3 8.36 10.36 12.43
5.84 7.8 9.8 11.76
Length of Thread b
- - - -
①,ds ≈ Pitch diameter OR ds = Major diameter
②,Try not to use the specifications in parentheses
③,When L-k1-2P ≤ b, make full thread