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Unit:inch

Hexalobular socket round head screws With Collar

ASME B 18.6.3 (T39-VI) - 2013

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美标ASME B18.6.3 (T39-VI) - 2013 ASME18.6. Hexalobular socket round head screws With Collar
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Thread Size
d
2# 3# 4# 5# 6# 7# 8# 10# 12# 14#
d Nominal Size
PP
M Ref.
Socket No.
P max
min
dk Ref.
dc max
min
k max
min
c Ref.
0.0860 0.0990 0.1120 0.1250 0.1380 0.1510 0.1640 0.1900 0.2160 0.2420
56 48 40 40 32 / 32 24 24 /
0.081 0.094 0.111 0.111 0.132 0.132 0.155 0.178 0.200 0.221
T7 T8 T9 T10 T15 T15 T20 T25 T27 T30
0.035 0.035 0.040 0.045 0.060 0.070 0.065 0.075 0.080 0.085
0.030 0.030 0.035 0.035 0.050 0.060 0.050 0.060 0.065 0.070
0.136 0.156 0.177 0.198 0.218 0.238 0.259 0.300 0.341 0.382
0.202 0.232 0.261 0.291 0.321 0.350 0.380 0.439 0.498 0.558
0.186 0.215 0.243 0.272 0.301 0.330 0.358 0.416 0.473 0.531
0.062 0.070 0.079 0.088 0.096 0.105 0.113 0.130 0.148 0.165
0.050 0.058 0.067 0.075 0.084 0.092 0.101 0.118 0.134 0.151
0.030 0.030 0.030 0.040 0.040 0.040 0.040 0.050 0.050 0.050
Thread Size
d
1/4 16# 18# 5/16 20# 24# 3/8 7/16 1/2
d Nominal Size
PP
M Ref.
Socket No.
P max
min
dk Ref.
dc max
min
k max
min
c Ref.
0.2500 0.2680 0.2940 0.3125 0.3200 0.3720 0.3750 0.4375 0.5000
20 / / 18 / / 16 14 13
0.221 0.221 0.266 0.266 0.266 0.312 0.312 0.352 0.446
T30 T30 T40 T40 T40 T45 T45 T50 T55
0.090 0.105 0.105 0.120 0.125 0.125 0.130 0.150 0.170
0.075 0.090 0.090 0.105 0.110 0.110 0.115 0.135 0.155
0.396 0.423 0.661 0.494 0.505 0.587 0.593 0.691 0.790
0.576 0.617 0.676 0.719 0.736 0.854 0.861 1.004 1.146
0.548 0.588 0.646 0.687 0.703 0.818 0.825 0.963 1.101
0.170 0.182 0.199 0.211 0.216 0.251 0.253 0.294 0.335
0.157 0.168 0.185 0.197 0.202 0.236 0.238 0.278 0.319
0.050 0.060 0.060 0.060 0.060 0.060 0.060 0.070 0.090
①,Where specifying nominal size in decimals, zeros preceding the decimal and in the fourth decimal place shall be omitted.
②,Sizes 7, 14, 16, 18, 20, and 24 are for tapping screws only.
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