Click Specification

(Non-preferred) dimensions in parentheses.

Slottted Oval Countersunk Head Screws： Short Length

BS 1981 - 1991

Display drawing:

Screw Thread
d

(1#)

(3#)

10#

(12#)

1/4

5/16

3/8

d_k	max
	min
k
n	max
	min
t	max
	min

0.119	0.146	0.172	0.199	0.225	0.252	0.279	0.332	0.385	0.438	0.507	0.635	0.762
0.099	0.123	0.147	0.171	0.195	0.22	0.244	0.292	0.34	0.389	0.452	0.568	0.685
0.025	0.031	0.036	0.042	0.047	0.053	0.059	0.07	0.081	0.092	0.107	0.134	0.161
0.023	0.026	0.031	0.035	0.039	0.043	0.048	0.054	0.06	0.067	0.075	0.084	0.094
0.016	0.019	0.023	0.027	0.031	0.035	0.039	0.045	0.05	0.056	0.064	0.072	0.081
0.028	0.034	0.04	0.047	0.053	0.059	0.065	0.078	0.09	0.103	0.119	0.149	0.179
0.022	0.027	0.033	0.038	0.043	0.048	0.053	0.064	0.074	0.085	0.098	0.124	0.149

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