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Click Specification

Unit:inch

Hexagon Socket Countersunk Head Screws - Unified Thread

BS 2470 - 1973

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英标BS 2470 - 1973 BS2470 2470BS Hexagon Socket Countersunk Head Screws - Unified Thread
Screw Thread
d
0# 1# 2# 3# 4# 5# 6# 8#
ds max
min
dk max
min
s Nominal Size
t min
b min
k Ref.
0.0600 0.0730 0.0860 0.0990 0.1120 0.1250 0.1380 0.1640
0.0568 0.0695 0.0822 0.0949 0.1075 0.1202 0.1329 0.1585
0.138 0.168 0.197 0.226 0.255 0.281 0.307 0.359
0.117 0.143 0.168 0.193 0.218 0.240 0.263 0.311
0.035 0.050 0.050 1/16 1/16 5/64 5/64 3/32
0.025 0.031 0.038 0.044 0.055 0.061 0.066 0.076
0.500 0.625 0.625 0.625 0.750 0.750 0.750 0.875
0.046 0.057 0.066 0.075 0.085 0.093 0.1 0.116
Screw Thread
d
10# 1/4 5/16 3/8 7/16 1/2 5/8 3/4
ds max
min
dk max
min
s Nominal Size
t min
b min
k Ref.
0.1900 0.2500 0.3125 0.3750 0.4375 0.5000 0.6250 0.7500
0.1840 0.2435 0.3053 0.3678 0.4294 0.4919 0.6163 0.7406
0.411 0.531 0.656 0.781 0.844 0.937 1.188 1.438
0.359 0.476 0.589 0.704 0.755 0.857 1.065 1.293
1/8 5/32 3/16 7/32 1/4 5/16 3/8 1/2
0.087 0.111 0.135 0.159 0.159 0.172 0.220 0.220
0.875 1.000 1.125 1.250 1.375 1.500 1.750 2.000
0.131 0.167 0.205 0.241 0.242 0.260 0.335 0.41
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