| Pin Fields | Diameter D, and UNC Thread | Inside Length, L | Inside Width, C | Thread Length, T | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3,D | 5, LCT | Basic | Max | Min | Basic | Max | Min | Max | Min | |
| 03 | 015 | 10 - 24 | 1.500 | 1.530 | 1.470 | 0.375 | 0.385 | 0.365 | 0.935 | 0.815 |
| 03 | 018 | 10 - 24 | 1.813 | 1.843 | 1.783 | 0.313 | 0.323 | 0.303 | 1.310 | 1.190 |
| 03 | 025 | 10 - 24 | 2.500 | 2.530 | 2.470 | 0.375 | 0.385 | 0.365 | 1.060 | 0.940 |
| 03 | 035 | 10 - 24 | 3.500 | 3.530 | 3.470 | 0.375 | 0.385 | 0.365 | 1.560 | 1.440 |
| 04 | 018 | 1/4 - 20 | 1.750 | 1.780 | 1.720 | 0.500 | 0.515 | 0.485 | 0.935 | 0.815 |
| 04 | 023 | 1/4 - 20 | 2.250 | 2.280 | 2.220 | 0.500 | 0.515 | 0.485 | 1.310 | 1.190 |
| 04 | 028 | 1/4 - 20 | 2.750 | 2.780 | 2.720 | 0.500 | 0.515 | 0.485 | 1.310 | 1.190 |
| 04 | 033 | 1/4 - 20 | 3.250 | 3.280 | 3.220 | 0.500 | 0.515 | 0.485 | 1.310 | 1.190 |
| 04 | 038 | 1/4 - 20 | 3.750 | 3.780 | 3.720 | 0.500 | 0.515 | 0.485 | 1.560 | 1.440 |
| 04 | 048 | 1/4 - 20 | 4.750 | 4.780 | 4.720 | 0.500 | 0.515 | 0.485 | 2.560 | 2.440 |
| 04 | 058 | 1/4 - 20 | 5.750 | 5.810 | 5.690 | 0.500 | 0.515 | 0.485 | 3.060 | 2.940 |
| 04 | 068 | 1/4 - 20 | 6.750 | 6.810 | 6.690 | 0.500 | 0.515 | 0.485 | 4.060 | 3.940 |
| 05 | 018 | 5/16 - 18 | 1.813 | 1.843 | 1.783 | 0.625 | 0.640 | 0.610 | 0.935 | 0.815 |
| 05 | 028 | 5/16 - 18 | 2.813 | 2.843 | 2.783 | 0.625 | 0.640 | 0.610 | 1.310 | 1.190 |
| 05 | 038 | 5/16 - 18 | 3.813 | 3.843 | 3.783 | 0.625 | 0.640 | 0.610 | 1.560 | 1.440 |
| 05 | 048 | 5/16 - 18 | 4.813 | 4.843 | 4.783 | 0.625 | 0.640 | 0.610 | 2.560 | 2.440 |
| 06 | 021 | 3/8 - 16 | 2.125 | 2.155 | 2.095 | 0.750 | 0.765 | 0.735 | 0.935 | 0.815 |
| 06 | 031 | 3/8 - 16 | 3.125 | 3.155 | 3.095 | 0.750 | 0.765 | 0.735 | 1.310 | 1.190 |
| 06 | 036 | 3/8 - 16 | 3.625 | 3.655 | 3.595 | 0.750 | 0.765 | 0.735 | 1.560 | 1.440 |
| 06 | 041 | 3/8 - 16 | 4.125 | 4.155 | 4.095 | 0.750 | 0.765 | 0.735 | 1.560 | 1.440 |
| 06 | 051 | 3/8 - 16 | 5.125 | 5.185 | 5.065 | 0.750 | 0.765 | 0.735 | 2.560 | 2.440 |
| 06 | 061 | 3/8 - 16 | 6.125 | 6.185 | 6.065 | 0.750 | 0.765 | 0.735 | 3.060 | 2.940 |
| 06 | 071 | 3/8 - 16 | 7.125 | 7.185 | 7.065 | 0.750 | 0.765 | 0.735 | 4.060 | 3.940 |
| 08 | 035 | 1/2 - 13 | 3.500 | 3.530 | 3.470 | 1.000 | 1.015 | 0.985 | 1.560 | 1.440 |
| 08 | 055 | 1/2 - 13 | 5.500 | 5.560 | 5.44 | 1.000 | 1.015 | 0.985 | 2.560 | 2.440 |
| 08 | 075 | 1/2 - 13 | 7.500 | 7.560 | 7.440 | 1.000 | 1.015 | 0.985 | 4.060 | 3.940 |
| 12 | 083 | 3/4 - 10 | 8.250 | 8.340 | 8.160 | 0.875 | 0.890 | 0.860 | 3.060 | 2.940 |
| 12 | 103 | 3/4 - 10 | 10.250 | 10.340 | 10.160 | 0.875 | 0.890 | 0.860 | 3.060 | 2.940 |
| 12 | 133 | 3/4 - 10 | 13.250 | 13.370 | 13.130 | 0.875 | 0.890 | 0.860 | 3.060 | 2.940 |
Notes :
UNC Threads are standards for low strength materials, but UNF threads are usually available on special
order.
Dimension C should be measured at maximum diameter of the inner circle.
