
| Nominal Size (Basic Screw Diameter) |
Head Diameter, A |
Head Height, H |
Head Side Height, S (Ref.) |
Nominal Hexagon Socket Sizze, J |
Minimum Key Engagement, T |
Fillet Extension, F |
Nominal Maximum Standard Length, L |
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | Min | Max | Min | Max. | Min | |||||||
| 0 | (0.0600) | 0.114 | 0.104 | 0.032 | 0.026 | 0.010 | ... | 0.035 | 0.020 | 0.080 | 0.070 | 0.50 |
| 1 | (0.0730) | 0.139 | 0.129 | 0.039 | 0.033 | 0.010 | ... | 0.050 | 0.028 | 0.093 | 0.083 | 0.50 |
| 2 | (0.0860) | 0.164 | 0.154 | 0.046 | 0.038 | 0.010 | ... | 0.050 | 0.028 | 0.106 | 0.096 | 0.50 |
| 3 | (0.0990) | 0.188 | 0.176 | 0.052 | 0.044 | 0.010 | 1/16 | 0.062 | 0.035 | 0.119 | 0.109 | 0.50 |
| 4 | (0.1120) | 0.213 | 0.201 | 0.059 | 0.051 | 0.015 | 1/16 | 0.062 | 0.035 | 0.132 | 0.122 | 0.50 |
| 5 | (0.1250) | 0.238 | 0.226 | 0.066 | 0.058 | 0.015 | 5/64 | 0.078 | 0.044 | 0.145 | 0.135 | 0.50 |
| 6 | (0.1380) | 0.262 | 0.250 | 0.073 | 0.063 | 0.015 | 5/64 | 0.078 | 0.044 | 0.158 | 0.148 | 0.063 |
| 8 | (0.1640) | 0.312 | 0.298 | 0.087 | 0.077 | 0.015 | 3/32 | 0.094 | 0.052 | 0.194 | 0.184 | 0.75 |
| 10 | (0.1900) | 0.361 | 0.347 | 0.101 | 0.091 | 0.020 | 1/8 | 0.125 | 0.070 | 0.220 | 0.210 | 1.00 |
| 1/4 | (0.2500) | 0.437 | 0.419 | 0.132 | 0.122 | 0.031 | 5/32 | 0.156 | 0.087 | 0.290 | 0.280 | 1.00 |
| 5/16 | (0.3125) | 0.547 | 0.527 | 0.166 | 0.152 | 0.031 | 3/16 | 0.188 | 0.105 | 0.353 | 0.343 | 1.00 |
| 3/8 | (0.3750) | 0.656 | 0.636 | 0.199 | 0.185 | 0.031 | 7/32 | 0.219 | 0.122 | 0.415 | 0.405 | 1.25 |
| 7/16 | (0.4375) | 0.765 | 0.746 | 0.231 | 0.218 | 0.031 | 1/4 | 0.250 | 0.140 | 0.478 | 0.468 | 1.50 |
| 1/2 | (0.5000) | 0.875 | 0.851 | 0.265 | 0.245 | 0.046 | 5/16 | 0.312 | 0.175 | 0.560 | 0.540 | 2.00 |
| 5/8 | (0.7180) | 1.000 | 0.970 | 0.331 | 0.311 | 0.062 | 3/8 | 0.375 | 0.210 | 0.685 | 0.665 | 2.00 |
| 3/4 | (0.7500) | 1.125 | 1.105 | 0.375 | 0.355 | 0.062 | 7/16 | 0.437 | 0.245 | 0.740 | 0.720 | 2.50 |