Socket Head Products Dimensions
Dimensions for socket head cap screws, flat head socket head cap screws, button head cap screws, socket head shoulder screws (stripper bolts), and socket set screws (flat, oval, cup, cone, dog and half-dog point).
Socket Head Product Dimensions
SOCKET HEAD CAP SCREW DIMENSIONS
Table S1 |
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Bolt Size | A | B | C Hexagon Socket Head Size |
D | E Chamfer or Radius |
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max | min | max | min | max | min | |||
0 | 0.0600 | 0.0568 | 0.096 | 0.091 | 0.050 | 0.060 | 0.057 | 0.003 |
1 | 0.0730 | 0.0695 | 0.118 | 0.112 | 0.062 | 0.073 | 0.070 | 0.003 |
2 | 0.0860 | 0.0822 | 0.140 | 0.134 | 0.078 | 0.086 | 0.083 | 0.003 |
3 | 0.0990 | 0.0949 | 0.161 | 0.154 | 0.078 | 0.099 | 0.095 | 0.003 |
4 | 0.1120 | 0.1075 | 0.183 | 0.176 | 0.094 | 0.112 | 0.108 | 0.005 |
5 | 0.1250 | 0.1202 | 0.205 | 0.198 | 0.094 | 0.125 | 0.121 | 0.005 |
6 | 0.1380 | 0.1329 | 0.226 | 0.218 | 0.109 | 0.138 | 0.134 | 0.005 |
8 | 0.1640 | 0.1585 | 0.270 | 0.262 | 0.141 | 0.164 | 0.159 | 0.005 |
10 | 0.1900 | 0.1840 | 0.312 | 0.303 | 0.156 | 0.190 | 0.185 | 0.005 |
1/4" | 0.2500 | 0.2435 | 0.375 | 0.365 | 0.188 | 0.250 | 0.244 | 0.008 |
5/16" | 0.3125 | 0.3053 | 0.469 | 0.457 | 0.250 | 0.312 | 0.306 | 0.008 |
3/8" | 0.3750 | 0.3678 | 0.562 | 0.550 | 0.312 | 0.375 | 0.368 | 0.008 |
7/16" | 0.4375 | 0.4294 | 0.656 | 0.642 | 0.375 | 0.438 | 0.430 | 0.010 |
1/2" | 0.5000 | 0.4919 | 0.750 | 0.735 | 0.375 | 0.500 | 0.492 | 0.010 |
5/8" | 0.6250 | 0.6163 | 0.938 | 0.921 | 0.500 | 0.625 | 0.616 | 0.010 |
3/4" | 0.7500 | 0.7406 | 1.125 | 1.107 | 0.625 | 0.750 | 0.740 | 0.010 |
7/8" | 0.8750 | 0.8647 | 1.312 | 1.293 | 0.750 | 0.875 | 0.864 | 0.015 |
1" | 1.0000 | 0.9886 | 1.500 | 1.479 | 0.750 | 1.000 | 0.988 | 0.015 |
1-1/8" | 1.1250 | 1.1086 | 1.688 | 1.665 | 0.875 | 1.125 | 1.111 | 0.015 |
1-1/4" | 1.2500 | 1.2336 | 1.875 | 1.852 | 0.875 | 1.250 | 1.236 | 0.015 |
1-3/8" | 1.3750 | 1.3568 | 2.062 | 2.038 | 1.000 | 1.375 | 1.360 | 0.015 |
1-1/2" | 1.5000 | 1.4818 | 2.250 | 2.224 | 1.000 | 1.500 | 1.485 | 0.015 |
1-3/4" | 1.7500 | 1.7295 | 2.625 | 2.597 | 1.250 | 1.750 | 1.734 | 0.015 |
2" | 2.0000 | 1.9780 | 3.000 | 2.970 | 1.500 | 2.000 | 1.983 | 0.015 |
2-1/4" | 2.2500 | 2.2280 | 3.375 | 3.344 | 1.750 | 2.250 | 2.232 | 0.031 |
2-1/2" | 2.5000 | 2.4762 | 3.750 | 3.717 | 1.750 | 2.500 | 2.481 | 0.031 |
2-3/4" | 2.7500 | 2.7262 | 4.125 | 4.090 | 2.000 | 2.750 | 2.730 | 0.031 |
3" | 3.0000 | 2.9762 | 4.500 | 4.464 | 2.250 | 3.000 | 2.979 | 0.031 |
3-1/4" | 3.2500 | 3.2262 | 4.875 | 4.837 | 2.250 | 3.250 | 3.228 | 0.031 |
3-1/2" | 3.500 | 3.4762 | 5.250 | 5.211 | 2.750 | 3.500 | 3.478 | 0.031 |
3-3/4" | 3.750 | 3.7262 | 5.625 | 5.584 | 2.750 | 3.750 | 3.727 | 0.031 |
4" | 4.0000 | 3.9762 | 6.000 | 5.958 | 3.000 | 4.000 | 3.976 | 0.031 |
FLAT HEAD SOCKET CAP SCREW DIMENSIONS
Table S2 |
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Bolt Size | A | B1 | B2 | C Hexagon Socket Head Size |
D Head Height |
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max | min | Theoretical Sharp, max | Absolute min | Reference | Flushness Tolerance | ||
0 | 0.0600 | 0.0568 | 0.138 | 0.117 | 0.035 | 0.044 | 0.006 |
1 | 0.0730 | 0.0695 | 0.168 | 0.143 | 0.050 | 0.054 | 0.007 |
2 | 0.0860 | 0.0822 | 0.197 | 0.168 | 0.050 | 0.064 | 0.008 |
3 | 0.0990 | 0.0949 | 0.226 | 0.193 | 0.062 | 0.073 | 0.010 |
4 | 0.1120 | 0.1075 | 0.255 | 0.218 | 0.062 | 0.083 | 0.011 |
5 | 0.1250 | 0.1202 | 0.281 | 0.240 | 0.078 | 0.090 | 0.012 |
6 | 0.1380 | 0.1329 | 0.307 | 0.263 | 0.078 | 0.097 | 0.013 |
8 | 0.1640 | 0.1585 | 0.359 | 0.311 | 0.094 | 0.112 | 0.014 |
10 | 0.1900 | 0.1840 | 0.411 | 0.359 | 0.125 | 0.127 | 0.015 |
1/4" | 0.2500 | 0.2435 | 0.531 | 0.480 | 0.156 | 0.161 | 0.016 |
5/16" | 0.3125 | 0.3053 | 0.656 | 0.600 | 0.188 | 0.198 | 0.017 |
3/8" | 0.3750 | 0.3678 | 0.781 | 0.720 | 0.219 | 0.234 | 0.018 |
7/16" | 0.4375 | 0.4294 | 0.844 | 0.781 | 0.250 | 0.234 | 0.018 |
1/2" | 0.5000 | 0.4919 | 0.938 | 0.872 | 0.312 | 0.251 | 0.018 |
5/8" | 0.6250 | 0.6163 | 1.188 | 1.112 | 0.375 | 0.324 | 0.022 |
3/4" | 0.7500 | 0.7406 | 1.438 | 1.355 | 0.500 | 0.396 | 0.024 |
7/8" | 0.8750 | 0.8647 | 1.688 | 1.604 | 0.562 | 0.468 | 0.025 |
1" | 1.0000 | 0.9886 | 1.938 | 1.841 | 0.625 | 0.540 | 0.028 |
1-1/8" | 1.1250 | 1.1086 | 2.188 | 2.079 | 0.750 | 0.611 | 0.031 |
1-1/4" | 1.2500 | 1.2336 | 2.438 | 2.316 | 0.875 | 0.683 | 0.035 |
1-3/8" | 1.3750 | 1.3568 | 2.688 | 2.553 | 0.875 | 0.755 | 0.038 |
1-1/2" | 1.5000 | 1.4818 | 2.938 | 2.791 | 1.000 | 0.827 | 0.042 |
BUTTON HEAD CAP SCREW DIMENSIONS
Table S3 |
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Bolt Size | A | C | D | ||
max | min | max | min | ||
0 | 0.114 | 0.104 | 0.035 | 0.032 | 0.026 |
1 | 0.139 | 0.129 | 0.050 | 0.039 | 0.033 |
2 | 0.164 | 0.154 | 0.050 | 0.046 | 0.038 |
3 | 0.188 | 0.176 | 0.062 | 0.052 | 0.044 |
4 | 0.213 | 0.201 | 0.062 | 0.059 | 0.051 |
5 | 0.238 | 0.226 | 0.078 | 0.066 | 0.058 |
6 | 0.262 | 0.250 | 0.078 | 0.073 | 0.063 |
8 | 0.312 | 0.298 | 0.094 | 0.087 | 0.077 |
10 | 0.361 | 0.347 | 0.125 | 0.101 | 0.091 |
1/4" | 0.437 | 0.419 | 0.156 | 0.132 | 0.122 |
5/16" | 0.547 | 0.527 | 0.188 | 0.166 | 0.152 |
3/8" | 0.656 | 0.636 | 0.219 | 0.199 | 0.185 |
1/2" | 0.875 | 0.851 | 0.312 | 0.265 | 0.245 |
5/8" | 1.000 | 0.970 | 0.375 | 0.331 | 0.311 |
SOCKET HEAD SHOULDER SCREW DIMENSIONS
(These are also known as stripper bolts)
Table S4 |
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Bolt Size | A | B | C Hexagon Socket Head Size |
D | E | F | ||||
max | min | max | min | max | min | Thread Diameter | TPI | |||
1/4" | 0.2480 | 0.2460 | 0.375 | 0.357 | 0.125 | 0.188 | 0.177 | 10 | 24 | 0.375 |
5/16" | 0.3105 | 0.3085 | 0.438 | 0.419 | 0.156 | 0.219 | 0.209 | 1/4 | 20 | 0.438 |
3/8" | 0.3730 | 0.3710 | 0.562 | 0.543 | 0.188 | 0.250 | 0.240 | 10 | 18 | 0.500 |
1/2" | 0.4980 | 0.4960 | 0.750 | 0.729 | 0.250 | 0.312 | 0.302 | 3/8 | 16 | 0.625 |
5/8" | 0.6230 | 0.6210 | 0.875 | 0.853 | 0.312 | 0.375 | 0.365 | 1/2 | 13 | 0.750 |
3/4" | 0.7480 | 0.7460 | 1.000 | 0.977 | 0.375 | 0.500 | 0.490 | 5/8 | 11 | 0.875 |
1" | 0.9980 | 0.9960 | 1.312 | 1.287 | 0.500 | 0.625 | 0.610 | 3/4 | 10 | 1.000 |
1-1/4" | 1.2480 | 1.2460 | 1.750 | 1.723 | 0.625 | 0.750 | 0.735 | 7/8 | 9 | 1.125 |
1-1/2" | 1.4980 | 1.4960 | 2.125 | 2.095 | 0.875 | 1.000 | 0.980 | 1-1/8 | 7 | 1.500 |
1-3/4" | 1.7480 | 1.7460 | 2.375 | 2.345 | 1.000 | 1.125 | 1.105 | 1-1/4 | 7 | 1.750 |
2" | 1.9980 | 1.9960 | 2.750 | 2.720 | 1.250 | 1.250 | 1.230 | 1-1/2 | 6 | 2.000 |
SOCKET SET SCREW DIMENSIONS
Table S5 |
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Bolt Size | C | G | H | I | J | K | |||
max | min | max | min | max | min | ||||
0 | 0.028 | 0.033 | 0.027 | 0.045 | 0.09 | 0.040 | 0.037 | 0.017 | 0.013 |
1 | 0.028 | 0.040 | 0.033 | 0.055 | 0.09 | 0.049 | 0.045 | 0.021 | 0.017 |
2 | 0.035 | 0.047 | 0.039 | 0.064 | 0.13 | 0.057 | 0.053 | 0.024 | 0.020 |
3 | 0.050 | 0.054 | 0.045 | 0.074 | 0.13 | 0.066 | 0.062 | 0.027 | 0.023 |
4 | 0.050 | 0.061 | 0.051 | 0.084 | 0.19 | 0.075 | 0.070 | 0.030 | 0.026 |
5 | 0.062 | 0.067 | 0.057 | 0.094 | 0.19 | 0.083 | 0.078 | 0.033 | 0.027 |
6 | 0.062 | 0.074 | 0.064 | 0.104 | 0.19 | 0.092 | 0.087 | 0.038 | 0.032 |
8 | 0.078 | 0.087 | 0.076 | 0.123 | 0.25 | 0.109 | 0.103 | 0.043 | 0.037 |
10 | 0.094 | 0.102 | 0.088 | 0.142 | 0.25 | 0.127 | 0.120 | 0.049 | 0.041 |
1/4" | 0.125 | 0.132 | 0.118 | 0.188 | 0.31 | 0.156 | 0.149 | 0.067 | 0.059 |
5/16" | 0.156 | 0.172 | 0.156 | 0.234 | 0.38 | 0.203 | 0.195 | 0.082 | 0.074 |
3/8" | 0.188 | 0.212 | 0.194 | 0.281 | 0.44 | 0.250 | 0.241 | 0.099 | 0.089 |
7/16" | 0.219 | 0.252 | 0.232 | 0.328 | 0.50 | 0.297 | 0.287 | 0.114 | 0.104 |
1/2" | 0.250 | 0.291 | 0.270 | 0.375 | 0.57 | 0.344 | 0.334 | 0.130 | 0.120 |
5/8" | 0.312 | 0.371 | 0.347 | 0.469 | 0.75 | 0.469 | 0.456 | 0.164 | 0.148 |
3/4" | 0.375 | 0.450 | 0.425 | 0.562 | 0.88 | 0.562 | 0.549 | 0.196 | 0.180 |
7/8" | 0.500 | 0.530 | 0.502 | 0.656 | 1.00 | 0.656 | 0.642 | 0.227 | 0.211 |
1" | 0.562 | 0.609 | 0.579 | 0.750 | 1.13 | 0.750 | 0.734 | 0.260 | 0.240 |
1-1/8" | 0.562 | 0.689 | 0.655 | 0.844 | 1.25 | 0.844 | 0.826 | 0.291 | 0.271 |
1-1/4" | 0.625 | 0.767 | 0.733 | 0.938 | 1.50 | 0.938 | 0.920 | 0.323 | 0.303 |
1-3/8" | 0.625 | 0.848 | 0.808 | 1.031 | 1.63 | 1.031 | 1.011 | 0.354 | 0.334 |
1-1/2" | 0.750 | 0.926 | 0.886 | 1.125 | 1.75 | 1.125 | 1.105 | 0.385 | 0.365 |
1-3/4" | 1.000 | 1.086 | 1.039 | 1.312 | 2.00 | 1.312 | 1.289 | 0.448 | 0.428 |
2" | 1.000 | 1.244 | 1.193 | 1.500 | 2.25 | 1.500 | 1.474 | 0.510 | 0.490 |