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Unit:inch

Recessed 90° Raised-Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 3]

BS 450 - 1958

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英标BS 450 - 1958 BS450 450BS Recessed 90° Raised-Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 3]
英标BS 450 - 1958 BS450 450BS Recessed 90° Raised-Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 3]
Thread Size
d
1/8 3/16 1/4 5/16 3/8
d
PP No. of Threads/Inch B.S.W.
B.S.F.
dk ref
max
min
k max
f Nominal Size
Socket No.
M Nominal Size
t max
min
0.1250 0.1875 0.2500 0.3125 0.3750
40 24 20 18 16
/ 32 26 22 20
0.237 0.356 0.475 0.594 0.712
0.219 0.328 0.438 0.547 0.656
0.201 0.307 0.412 0.518 0.624
0.056 0.084 0.113 0.141 0.169
0.026 0.040 0.051 0.068 0.080
1 2 3 4 4
0.123 0.197 0.275 0.341 0.394
0.092 0.137 0.169 0.199 0.254
0.076 0.119 0.151 0.181 0.236
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