BS 450 - 1958 Cross Recess Mushroom Head Screws


Unit: inch
Screw Thread
d
1/8 3/16 1/4 5/16 3/8
PP BSW
BSF
dk max
min
k max
min
n max
min
t
Socket No.
40 24 20 18 16
/ 32 26 22 20
0.289 0.448 0.573 0.698 0.823
0.272 0.425 0.546 0.666 0.787
0.078 0.118 0.15 0.183 0.215
0.066 0.103 0.133 0.162 0.191
0.043 0.06 0.075 0.084 0.094
0.035 0.05 0.064 0.072 0.081
0.04 0.061 0.079 0.096 0.112
1 2 3 4 4
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