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Unit:inch

Cross Recessed Pan Head Screws with B.S.W. & B.S.F. Threads [Table 5]

BS 450 - 1958

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英标BS 450 - 1958 BS450 450BS Cross Recessed Pan Head Screws with B.S.W. & B.S.F. Threads [Table 5]
Thread Size
d
1/8 3/16 7/32 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
min
r Full shank max
R Reduced shank max
Socket No.
M Nominal Size
t max
min
0.1250 0.1875 0.2188 0.2500 0.3125 0.3750 0.4375 0.5000
40 24 / 20 18 16 14 12
/ (32) (28) 26 22 20 18 16
0.245 0.373 0.425 0.492 0.615 0.74 0.863 0.987
0.231 0.357 0.407 0.473 0.594 0.716 0.838 0.958
0.075 0.11 0.125 0.144 0.178 0.212 0.247 0.281
0.065 0.099 0.112 0.13 0.162 0.195 0.227 0.26
0.010 0.015 0.015 0.031 0.031 0.031 0.031 0.031
0.020 0.025 0.025 0.040 0.045 0.045 0.050 0.050
2 2 3 3 4 4 4 4
0.146 0.184 0.242 0.266 0.333 0.371 0.392 0.413
0.084 0.122 0.135 0.160 0.191 0.230 0.252 0.274
0.066 0.104 0.117 0.142 0.173 0.212 0.234 0.256
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