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Click Specification

Recess Dimensions for Type I Nonindented Regular and Large Hex Head Screws

ASME B 18.6.3 (T31-I) - 2013

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美标ASME B18.6.3 (T31-I) - 2013 ASME18.6.3 Recess Dimensions for Type I Nonindented Regular and Large Hex Head Screws
Thread Size
d
8# 10# 12# 1/4 5/16 3/8
d Nominal Size
PP
M Ref.
Socket No.
P max
min
s1 Regular Head max
min
s2 Large Head max
min
e1 Regular Head min
e2 Large Head min
k max
min
0.1640 0.1900 0.2160 0.2500 0.3125 0.3750
32 24 24 20 18 16
0.183 0.198 0.262 0.277 0.359 0.387
2 2 3 3 4 4
0.110 0.125 0.139 0.154 0.196 0.225
0.087 0.102 0.116 0.131 0.174 0.203
0.250 0.312 0.312 0.375 0.500 0.562
0.244 0.305 0.305 0.367 0.489 0.551
0.312 / 0.375 0.438 / /
0.305 / 0.367 0.428 / /
0.272 0.340 0.340 0.409 0.545 0.614
0.340 / 0.409 0.477 / /
0.110 0.120 0.155 0.190 0.230 0.295
0.096 0.105 0.139 0.172 0.208 0.270
①,Where specifying nominal size in decimals, zeros preceding the decimal and in the fourth decimal place shall be omitted.