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Hexagon Socket Button Head Cap Screws

ASME B 18.3 - 2003 (R2008)

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美标ASME B18.3 - 2003 (R2008) ASME18.3 18. Hexagon Socket Button Head Cap Screws

 *Models with different eras.

Screw Thread
d
0# 1# 2# 3# 4# 5# 6# 8# 10# 1/4 5/16 3/8 1/2 5/8
d Nominal Diameter
PP UNC
UNF
UNEF
dk max
min
k max
min
s Nominal Size
t min
L max
0.060 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.250 0.3125 0.375 0.500 0.625
- 64.0 56.0 48.0 40.0 40.0 32.0 32.0 24.0 20.0 18.0 16.0 13.0 11.0
80.0 72.0 64.0 56.0 48.0 44.0 40.0 36.0 32.0 28.0 24.0 24.0 20.0 18.0
- - - - - - - - - 32.0 32.0 32.0 28.0 24.0
0.114 0.139 0.164 0.188 0.213 0.238 0.262 0.312 0.361 0.437 0.547 0.656 0.875 1.000
0.104 0.129 0.154 0.176 0.201 0.226 0.250 0.298 0.347 0.419 0.527 0.636 0.851 0.970
0.032 0.039 0.046 0.052 0.059 0.066 0.073 0.087 0.101 0.132 0.166 0.199 0.265 0.331
0.026 0.033 0.038 0.044 0.051 0.058 0.063 0.077 0.091 0.122 0.152 0.185 0.245 0.311
0.035 0.050 0.050 0.062 0.062 0.078 0.078 0.094 0.125 0.156 0.188 0.219 0.312 0.375
0.020 0.028 0.028 0.035 0.035 0.044 0.044 0.052 0.070 0.087 0.105 0.122 0.175 0.210
0.50 0.50 0.50 0.50 0.50 0.50 0.63 0.75 1.00 1.00 1.00 1.25 2.00 2.00

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