| Nominal Size | D | H | X | S | K | F | L | ||||
| Head Diameter |
Head Height |
Head
Side Height |
Hexagon Socket Size | Key Engage ment |
Fillet Extension | Max Standard Length | |||||
| Max | Min | Max | Min | Ref | Nom | Min | Max | Min | Nom | ||
| 4 5 6 8 |
0.213 0.238 0.262 0.312 |
0.201 0.226 0.250 0.298 |
0.059 0.066 0.073 0.087 |
0.051 0.055 0.063 0.077 |
0.015 0.015 0.015 0.015 |
1/16 5/64 5/64 3/32 |
0.062 0.078 0.078 0.094 |
0.035 0.044 0.044 0.052 |
0.010 0.010 0.010 0.015 |
0.005 0.005 0.005 0.010 |
0.50 0.50 0.63 0.75 |
| 10 1/4 5/16 3/8 |
0.361 0.437 0.547 0.656 |
0.347 0.419 0.527 0.636 |
0.101 0.132 0.166 0.199 |
0.091 0.122 0.152 0.185 |
0.020 0.031 0.031 0.031 |
1/8 5/32 3/16 7/32 |
0.125 0.156 0.188 0.219 |
0.070 0.087 0.105 0.122 |
0.015 0.020 0.020 0.020 |
0.010 0.015 0.015 0.015 |
1.00 1.00 1.00 1.25 |
| 1/2 5/8 |
0.875 1.000 |
0.851 0.970 |
0.265 0.331 |
0.245 0.311 |
0.046 0.062 |
5/16 3/8 |
0.312 0.375 |
0.175 0.210 |
0.030 0.030 |
0.020 0.020 |
2.00 2.00 |
| Nominal Size | B | D | H | S | K | F | |||
| Body Diameter | Head Diameter | Head Height | Hexagon Socket Size | Key Engage- ment |
Fillet Extension Above 0 | ||||
| Theo- retical Sharp Max |
Abs Min |
Refer- ence |
Flush- ness Toler- ance |
||||||
| Max | Min | Nom | Min | Max | |||||
| 4 5 6 8 |
0.1120 0.1250 0.1380 0.1640 |
0.1075 0.1202 0.1329 0.1585 |
0.255 0.281 0.307 0.359 |
0.218 0.240 0.263 0.311 |
0.083 0.090 0.097 0.112 |
0.011 0.012 0.013 0.014 |
1/16 5/64 5/64 3/32 |
0.055 0.061 0.066 0.076 |
0.012 0.014 0.015 0.015 |
| 10 1/4 5/16 3/8 |
0.1900 0.2500 0.3125 0.3750 |
0.1840 0.2435 0.3053 0.3678 |
0.411 0.531 0.656 0.781 |
0.359 0.480 0.600 0.720 |
0.127 0.161 0.198 0.234 |
0.015 0.016 0.017 0.018 |
1/8 5/32 3/16 7/32 |
0.087 0.111 0.135 0.159 |
0.015 0.015 0.015 0.015 |
| 7/16 1/2 5/8 3/4 |
0.4375 0.5000 0.6250 0.7500 |
0.4294 0.4919 0.6163 0.7406 |
0.844 0.938 1.188 1.438 |
0.781 0.872 1.112 1.355 |
0.234 0.251 0.324 0.396 |
0.018 0.018 0.022 0.024 |
1/4 5/16 3/8 1/2 |
0.159 0.172 0.220 0.220 |
0.015 0.015 0.015 0.015 |
| Nominal Size or Basic Screw Diameter |
B | D | H | S | C | X | K | W | ||||||||||||||||||||||
| Body Diameter | Head Diameter | Head Height | Head Side Height | Chamfer
or Radius |
Hexagon Socket Size | Key Engage- ment |
Wall Thick- ness |
|||||||||||||||||||||||
| Max | Min | Max | Min | Max | Min | Min | Max | Nom | Min | Min | ||||||||||||||||||||
|
.1120 .1250 .1380 .1640 .1900 .2500 .3125 .3750 |
.1075 .1202 .1329 .1585 .1840 .2435 .3053 .3678 |
.183 .205 .226 .270 .312 .375 .469 .562 |
.176 .198 .218 .262 .303 .365 .457 .550 |
.112 .125 .138 .164 .190 .250 .312 .375 |
.108 .121 .134 .159 .185 .244 .306 .368 |
.101 .112 .124 .148 .171 .225 .281 .337 |
.005 .005 .005 .005 .005 .008 .008 .008 |
3/32 3/32 7/64 9/64 5/32 3/16 1/4 5/16 |
.094 .094 .109 .141 .156 .188 .250 .312 |
.051 .057 .064 .077 .090 .120 .151 .182 |
.038 .043 .047 .056 .065 .095 .119 .143 |
||||||||||||||||||
| Nominal Size | B | D | H | S | K | F | ||||
| Basic Screw Diameter |
Head Diameter | Head Height | Socket Size | Engage- ment |
Fillet | |||||
| Max | Min | Max | Min | Min | Max | Min | ||||
| 8 10 1/4 5/16 |
0.1640 0.1900 0.2500 0.3125 |
.270 .312 .375 .437 |
.265 .307 .369 .431 |
.082 .095 .125 .156 |
.079 .092 .121 .152 |
.0781 .0938 .1250 .1562 |
.060 .072 .094 .120 |
.012 .014 .014 .017 |
.007 .009 .009 .012 |
|
| 3/8 7/16 1/2 |
0.3750 0.4375 0.5000 |
.562 .625 .750 |
.556 .618 .743 |
.187 .218 .250 |
.182 .213 .244 |
.1875 .2188 .2500 |
.145 .166 .184 |
.020 .023 .026 |
.015 .018 .020 |
|
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| Nominal Key Size |
F | C | S | L | R | K | ||||||
| Hexagon Width Across Flats | Hexagon Width Across Corner |
Length of Short Arm |
Length of Long Arm | Radius of Bend |
Chamfer | |||||||
| Short Series | Long Series | |||||||||||
| Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Min | Max | |
| 0.028 0.035 0.050 1/16 |
0.0280 0.0350 0.0500 0.0625 |
0.0275 0.0345 0.0490 0.0615 |
0.0314 0.0393 0.0560 0.0701 |
0.0300 0.0378 0.0540 0.0680 |
0.312 0.438 0.625 0.656 |
0.125 0.250 0.438 0.469 |
1.312 1.312 1.750 1.844 |
1.125 1.125 1..562 1.656 |
2.688 2.766 2.938 3.094 |
2.500 2.578 2.750 2.906 |
0.062 0.062 0.062 0.062 |
0.003 0.004 0.006 0.008 |
| 5/64 3/32 7/64 1/8 |
0.0781 0.0937 0.1094 0.1250 |
0.0771 0.0927 0.1079 0.1235 |
0.0880 0.1058 0.1238 0.1418 |
0.0859 0.1035 0.1210 0.1390 |
0.703 0.750 0.797 0.844 |
0.516 0.562 0.609 0.656 |
1.969 2.094 2.219 2.344 |
1.781 1.906 2.031 2.156 |
3.281 3.469 3.656 3.844 |
3.094 3.281 3.469 3.656 |
0.078 0.094 0.109 0.125 |
0.008 0.009 0.014 0.015 |
| 9/64 5/32 3/16 7/32 |
0.1406 0.1562 0.1875 0.2187 |
0.1391 0.1547 0.1860 0.2172 |
0.1593 0.1774 0.2135 0.2490 |
0.1566 0.1745 0.2105 0.2460 |
0.891 0.938 1.031 1.125 |
0.703 0.750 0.844 0.938 |
2.469 2.594 2.844 3.094 |
2.281 2.406 2.656 2.906 |
4.031 4.219 4.594 4.969 |
3.844 4.031 4.406 4.781 |
0.141 0.156 0.188 0.219 |
0.016 0.016 0.022 0.024 |
| 1/4 5/16 3/8 7/16 |
0.2500 0.3125 0.3750 0.4375 |
0.2485 0.3110 0.3735 0.4355 |
0.2845 0.3570 0.4285 0.5005 |
0.2815 0.3531 0.4238 0.4944 |
1.219 1.344 1.469 1.594 |
1.031 1.156 1.281 1.406 |
3.344 3.844 4.344 4.844 |
3.156 3.656 4.156 4.656 |
5.344 6.094 6.844 7.594 |
5.156 5.906 6.656 7.406 |
0.250 0.312 0.375 0.438 |
0.030 0.032 0.044 0.047 |
| 1/2 9/16 5/8 3/4 |
0.5000 0.5625 0.6250 0.7500 |
0.4975 0.5600 0.6225 0.7470 |
0.5715 0.6420 0.7146 0.8580 |
0.5650 0.6356 0.7080 0.8512 |
1.719 1.844 1.969 2.219 |
1.531 1.656 1.781 2.031 |
5.344 5.844 6.344 7.344 |
5.156 5.656 6.156 7.156 |
8.344 9.094 9.844 11.344 |
8.156 8.906 9.656 11.156 |
0.500 0.562 0.625 0.750 |
0.050 0.053 0.055 0.070 |
| 7/8 1 |
0.8750 1.0000 |
0.8720 0.9970 |
1.0020 1.1470 |
0.9931 1.1350 |
2.469 2.719 |
2.281 2.531 |
8.344 9.344 |
8.156 9.156 |
12.844 14.344 |
12.656 14.156 |
0.875 1.000 |
0.076 0.081 |
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| Nominal Size | O | Threads Per Inch | S | K | W | L | Tightening Torque (Inch-Lbs.) |
|
| Nominal O.D. |
Hex Socket Size |
Key Engage- ment |
Wall Thickness |
Overall Length | ||||
| Min | Min | Max | Min | |||||
| 1/16 1/8 1/4 3/8 |
0.307 0.401 0.529 0.667 |
27 27 18 18 |
5/32 3/16 1/4 5/16 |
.140 .140 .218 .250 |
.052 .049 .045 .040 |
.250 .250 .406 .406 |
.235 .235 .391 .391 |
150 250 600 1200 |
| 1/2 3/4 1 1-1/4 |
0.830 1.041 1.302 1.647 |
14 14 11-1/2 11-1/2 |
3/8 9/16 5/8 3/4 |
.312 .312 .375 .437 |
.067 .054 .112 .102 |
.531 .531 .656 .656 |
.516 .516 .641 .641 |
1800 3000 4200 5400 |
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| Nominal Size | O | Threads Per Inch | S | K | W | L | Tightening Torque (Inch-Lbs.) |
|
| Nominal O.D. |
Hex Socket Size |
Key Engage- ment |
Wall Thickness |
Overall Length | ||||
| Min | Min | Max | Min | |||||
| 1/16 1/8 1/4 3/8 1/2 |
0.3120 0.4050 0.5400 0.6750 0.8400 |
27 27 18 18 14 |
5/32 3/16 1/4 5/16 3/8 |
.1400 .1400 .2180 .2500 .3120 |
.0620 .0620 .0730 .0840 .0950 |
.3240 .3240 .4570 .5200 .5820 |
.3000 .3000 .4170 .4800 .5420 |
150 250 600 1200 1800 |
| 3/4 1 1-1/4 1-1/2 2 |
1.0500 1.3150 1.6600 1.9000 2.3750 |
14 11-1/2 11-1/2 11-1/2 11-1/2 |
9/16 5/8 3/4 1 1 |
.3120 .3750 .4370 .4370 .4370 |
.1250 .1250 .1560 .1560 .1560 |
.6450 .7700 .8320 .8430 .9060 |
.6050 .7300 .7920 .7800 .8440 |
3000 4200 5400 6900 8500 |
| Nominal Size | A | D | H | Z | S | K | E | F | |||
| Shoulder Diameter |
Head Diameter | Head Height | Head Side Height | Hexagon Socket Size |
Key Engage- ment |
Head Fillet Extension Above D |
Head Fillet Radius | ||||
| Max | Min | Max | Min | Max | Min | Min | Nom | Min | Max | Min | |
| 1/4 5/16 3/8 |
0.2480 0.3105 0.3730 |
0.2460 0.3085 0.3710 |
0.375 0.438 0.562 |
0.357 0.419 0.543 |
0.188 0.219 0.250 |
0.177 0.209 0.240 |
0.157 0.183 0.209 |
1/8 5/32 3/16 |
0.094 0.117 0.141 |
0.014 0.017 0.020 |
0.009 0.012 0.015 |
| 1/2 5/8 3/4 |
0.4980 0.6230 0.7480 |
0.4960 0.6210 0.7460 |
0.750 0.875 1.000 |
0.729 0.853 0.977 |
0.312 0.375 0.500 |
0.302 0.365 0.490 |
0.262 0.315 0.421 |
1/4 5/16 3/8 |
0.188 0.234 0.281 |
0.026 0.032 0.039 |
0.020 0.024 0.030 |
| Nominal Size | N | W | T | L | Q | C | B | |||
| Shoulder Neck Diameter |
Shoulder Neck Width | Nominal Thread Size |
Threads Per In. | Thread Neck Diameter | Thread Neck | Thread Neck Fillet | Thread Length |
|||
| Min | Max | Max | Min | Max | Max | Min | Basic | |||
| 1/4 5/16 3/8 |
0.227 0.289 0.352 |
0.093 0.093 0.093 |
10 1/4 5/16 |
24 20 18 |
0.142 0.193 0.249 |
0.133 0.182 0.237 |
0.083 0.100 0.111 |
0.023 0.028 0.031 |
0.017 0.022 0.025 |
0.375 0.438 0.500 |
| 1/2 5/8 3/4 |
0.477 0.602 0.727 |
0.093 0.093 0.093 |
3/8 1/2 5/8 |
16 13 11 |
0.304 0.414 0.521 |
0.291 0.397 0.502 |
0.125 0.154 0.182 |
0.035 0.042 0.051 |
0.029 0.036 0.045 |
0.625 0.750 0.875 |
| Nominal Size | S | K | F | 0 | D | H | A | ||||||||
| Hexagon Socket Size | Min Key Engage- ment |
Cup & Flat Point Diameter | Oval Point Radius |
Half Dog Point | Shortest Length To Which K Applies | Cone Pt. Angle 90° For These Lengths or Longer |
|||||||||
| Diameter | Length | Cup & Flat Points |
90° Cone & Oval Pts. |
Half Dog Point |
|||||||||||
| Nom | Min | Max | Min | Basic | Max | Min | Max | Min | |||||||
| 4 5 6 8 |
0.050 1/16 1/16 5/64 |
0.070 0.080 0.080 0.090 |
0.061 0.067 0.074 0.087 |
0.051 0.057 0.064 0.076 |
0.084 0.094 0.104 0.123 |
0.075 0.083 0.092 0.109 |
0.070 0.078 0.087 0.103 |
0.030 0.033 0.038 0.043 |
0.026 0.027 0.032 0.037 |
0.19 0.19 0.19 0.19 |
0.19 0.19 0.25 0.25 |
0.19 0.19 0.19 0.25 |
0.19 0.19 0.19 0.25 |
||
| 10 1/4 5/16 3/8 |
3/32 1/8 5/32 3/16 |
0.100 0.125 0.156 0.188 |
0.102 0.132 0.172 0.212 |
0.088 0.118 0.156 0.194 |
0.142 0.188 0.234 0.281 |
0.127 0.156 0.203 0.250 |
0.120 0.149 0.195 0.241 |
0.049 0.067 0.082 0.099 |
0.041 0.059 0.074 0.089 |
0.19 0.25 0.31 0.38 |
0.25 0.31 0.44 0.44 |
0.25 0.31 0.38 0.44 |
0.25 0.31 0.38 0.44 |
||
| 7/16 1/2 5/8 3/4 |
7/32 1/4 5/16 3/8 |
0.219 0.250 0.312 0.375 |
0.252 0.291 0.371 0.450 |
0.232 0.270 0.347 0.425 |
0.328 0.375 0.469 0.562 |
0.297 0.344 0.469 0.562 |
0.287 0.334 0.456 0.549 |
0.114 0.130 0.164 0.196 |
0.104 0.120 0.148 0.180 |
0.44 0.50 0.63 0.75 |
0.63 0.63 0.88 1.00 |
0.50 0.63 0.88 1.00 |
0.50 0.57 0.75 0.88 |
||
| 7/8 1 |
1/2 9/16 |
0.500 0.562 |
0.530 0.609 |
0.502 0.579 |
0.656 0.750 |
0.656 0.750 |
0.642 0.734 |
0.227 0.260 |
0.211 0.240 |
0.88 1.00 |
1.00 1.25 |
1.00 1.25 |
1.00 1.13 |
||
