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Click Specification

(Non-preferred) dimensions in parentheses.

Unit:inch

Cross Recessed Pan Head Machine Screws

BS 1981 - 1991

Display drawing:

英标BS 1981 - 1991 BS1981 1981BS Cross Recessed Pan Head Machine Screws
Screw Thread
d
2# (3#) 4# 5# 6# 8# 10# (12#) 1/4 5/16 3/8 7/16 1/2
dk max
min
k max
min
Socket No.
m Nominal Size
Penetration depth max
min
0.167 0.193 0.219 0.245 0.270 0.322 0.373 0.425 0.492 0.615 0.740 0.863 0.987
0.155 0.180 0.205 0.231 0.256 0306 0.357 0.407 0.473 0.594 0.716 0.838 0.958
0.062 0.071 0.080 0.089 0.097 0.115 0.133 0.151 0.175 0.218 0.261 0.304 0.348
0.053 0.062 0.070 0.079 0.087 0.105 0.122 0.139 0.162 0.203 0.244 0.286 0.327
1 1 1 2 2 2 2 3 3 4 4 4 4
0.096 0.104 0.114 0.146 0.154 0.169 0.185 0.246 0.265 0.333 0.369 0.392 0.412
0.053 0.062 0.072 0.068 0.076 0.092 0.108 0.117 0.137 0.164 0.201 0.224 0.246
0.043 0.052 0.062 0.050 0.058 0.074 0.09 0.099 0.119 0.146 0.183 0.206 0.228
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