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Cross Recessed 90° Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]

BS 450 - 1958

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英标BS 450 - 1958 BS450 450BS Cross Recessed 90° Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]
Thread Size
d
1/8 3/16 1/4 5/16 3/8 7/16 1/2
d
PP No. of Threads/Inch B.S.W.
B.S.F.
dk max
min
k max
Socket No.
M Nominal Size
t depth max
min
0.1250 0.1875 0.2500 0.3125 0.3750 0.4375 0.5000
40 24 20 18 16 14 12
/ 32 26 22 20 18 16
0.219 0.328 0.438 0.547 0.656 0.766 0.875
0.201 0.307 0.412 0.518 0.624 0.729 0.835
0.056 0.084 0.113 0.141 0.169 0.197 0.225
1 2 3 4 4 4 4
0.099 0.166 0.250 0.309 0.357 0.386 0.417
0.068 0.106 0.146 0.168 0.216 0.245 0.276
0.052 0.088 0.128 0.150 0.198 0.227 0.258

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