Machinery's Handbook, 31st Edition
Sockets
1821
Table 11. American National Standard Hexagon and Spline Sockets ANSI/ASME B18.3-2012 T* J T* J
BROACHED SOCKET HEXAGON SOCKETS
Socket Width Across Flats
Socket Width Across Flats
Socket Width Across Flats
Socket Width Across Flats
Nominal Socket Size
Nominal Socket Size
Nominal Socket Size
Nominal Socket Size
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
J
J
J
J
0.1426 0.1406 0.1587 0.1562 0.1900 0.1875 0.2217 0.2187 0.2530 0.2500 0.3160 0.3125 0.3790 0.3750
0.4420 0.4375 1 1 ∕ 4 0.5050 0.5000 1 1 ∕ 2 0.5680 0.5625 1 3 ∕ 4 0.6310 0.6250 0.7570 0.7500 2 1 ∕ 4 0.8850 0.8750 2 3 ∕ 4 1.0200 1.0000 3 2
1.2750 1.2500 1.5300 1.5000 1.7850 1.7500 2.0400 2.0000 2.2950 2.2500 2.8050 2.7500 3.0600 3.0000
0.028 0.0285 0.0280 0.035 0.0355 0.0350 0.050 0.0510 0.0500
9 ∕ 64 5 ∕ 32 3 ∕ 16 7 ∕ 32
7 ∕ 16 1 ∕ 2 9 ∕ 16
0.0635 0.0625 0.0791 0.0781 0.0952 0.0937 0.1111 0.1094 0.1270 0.1250
1 ∕ 16 5 ∕ 64 3 ∕ 32 7 ∕ 64
5 ∕ 8 3 ∕ 4 7 ∕ 8
1 ∕ 4
5 ∕ 16
1
3 ∕ 8
… … … … … … … … … T* T* M
1 ∕ 8
N
P
P
N
M
SPLINE SOCKETS a
Socket Major Diameter
Socket Minor Diameter
Width of Tooth
Nominal Socket Size
Number of Teeth
Max.
Min.
Max.
Min.
Max.
Min.
M
N
P
0.033 0.048 0.060 0.072 0.096 0.111 0.133 0.145 0.168 0.183 0.216 0.251 0.291 0.372 0.454 0.595 0.620 0.698 0.790
4 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
0.0350 0.050 0.062 0.074 0.098 0.115 0.137 0.149 0.173 0.188 0.221 0.256 0.298 0.380 0.463 0.604 0.631 0.709 0.801
0.0340 0.049 0.061 0.073 0.097 0.113 0.135 0.147 0.171 0.186 0.219 0.254 0.296 0.377 0.460 0.601 0.627 0.705 0.797
0.0260 0.041 0.051 0.064 0.082 0.098 0.118 0.128 0.150 0.163 0.190 0.221 0.254 0.319 0.386 0.509 0.535 0.604 0.685
0.0255 0.040 0.050 0.063 0.080 0.096 0.116 0.126 0.147 0.161 0.188 0.219 0.252 0.316 0.383 0.506 0.531 0.600 0.681
0.0120 0.011 0.014 0.016 0.022 0.025 0.030 0.032 0.036 0.039 0.050 0.060 0.068 0.092 0.112 0.138 0.149 0.168 0.189
0.0115 0.010 0.013 0.015 0.021 0.023 0.028 0.030 0.033 0.037 0.048 0.058 0.066 0.089 0.109 0.134 0.145 0.164
0.185 a Spline driven fasteners are removed from the latest revision. For additional information on these fasteners, see ANSI/ASME B18.3-1998. All dimensions are in inches. * Socket depths, T , for various screw types are given in the standard but are not shown here. Where sockets are chamfered, the depth of chamfer shall not exceed 10 percent of the nominal socket size for sizes up to and including 1 ∕ 16 inch for hexagon sockets and 0.060 for spline sockets, and 7.5 percent for larger sizes.
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