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Unit:inch

Slotted 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 Slotted 90°Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]
英标BS 450 - 1958 BS450 450BS Slotted 90°Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]
Thread Size
d
1/8 3/16 7/32 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4
d Nominal Diameter
PP No. of Threads/Inch BSW
BSF
dk Ref.
max
min
k max
n max
min
t Nominal Size
0.1250 0.1875 0.2188 0.2500 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500
40 24 / 20 18 16 14 12 12 11 10
/ 32 28 26 22 20 18 16 16 14 12
0.237 0.356 0.415 0.475 0.594 0.712 0.831 0.950 1.069 1.187 1.425
0.219 0.328 0.383 0.438 0.547 0.656 0.766 0.875 0.984 1.094 1.312
0.201 0.307 0.36 0.412 0.518 0.624 0.729 0.835 0.941 1.046 1.257
0.056 0.084 0.098 0.113 0.141 0.169 0.197 0.225 0.253 0.281 0.338
0.039 0.05 0.055 0.061 0.071 0.082 0.093 0.104 0.115 0.126 0.148
0.032 0.042 0.046 0.051 0.061 0.072 0.082 0.092 0.103 0.113 0.134
0.027 0.041 0.048 0.055 0.069 0.083 0.097 0.111 0.125 0.138 0.166
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