ASME B18.31.5 Round Bend U Bolts
Dimensions of ASME B18.31.5 Round Bend U Bolts
| Pin Fields | Diameter D, and UNC Thread | Inside Length, L | Inside Width, C | Thread Length, T | Nominal Pipe Size | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3,D | 5, LCT | Basic | Max | Min | Basic | Max | Min | Max | Min | ||
| 04 | 012 | 1/4 - 20 | 1.250 | 1.280 | 1.220 | 0.563 | 0.593 | 0.533 | 0.810 | 0.690 | 1/4 |
| 04 | 013 | 1/4 - 20 | 1.250 | 1.280 | 1.220 | 0.750 | 0.780 | 0.720 | 0.685 | 0.565 | 3/8 |
| 04 | 022 | 1/4 - 20 | 2.250 | 2.280 | 2.220 | 0.750 | 0.780 | 0.720 | 1.560 | 1.440 | 3/8 |
| 04 | 017 | 1/4 - 20 | 1.750 | 1.780 | 1.720 | 1.000 | 1.030 | 0.970 | 1.060 | 0.940 | 1/2 |
| 04 | 020 | 1/4 - 20 | 2.000 | 2.030 | 1.970 | 1.000 | 1.030 | 0.970 | 1.060 | 0.940 | 3/4 |
| 04 | 031 | 1/4 - 20 | 3.125 | 3.155 | 3.095 | 1.000 | 1.155 | 0.970 | 1.560 | 1.440 | 3/4 |
| 04 | 023 | 1/4 - 20 | 2.250 | 2.280 | 2.220 | 1.125 | 1.155 | 1.095 | 1.310 | 1.190 | 3/4 |
| 04 | 027 | 1/4 - 20 | 2.750 | 2.780 | 2.720 | 1.125 | 1.155 | 1.095 | 1.435 | 1.315 | 1 |
| 04 | 034 | 1/4 - 20 | 3.438 | 3.468 | 3.408 | 1.125 | 1.280 | 1.095 | 2.435 | 2.315 | 1 |
| 04 | 030 | 1/4 - 20 | 3.000 | 3.030 | 2.970 | 1.250 | 1.280 | 1.220 | 1.435 | 1.315 | 1 1/4 |
| 04 | 032 | 1/4 - 20 | 3.250 | 3.280 | 3.220 | 1.250 | 1.405 | 1.220 | 1.435 | 1.315 | 1 1/2 |
| 05 | 021 | 5/16 - 18 | 2.188 | 2.218 | 2.158 | 1.375 | 1.405 | 1.345 | 1.435 | 1.315 | 1/2 |
| 05 | 0222 | 5/16 - 18 | 2.188 | 2.218 | 2.158 | 1.375 | 1.530 | 1.345 | 1.060 | 0.940 | 3/4 |
| 05 | 023 | 5/16 - 18 | 2.188 | 2.218 | 2.158 | 1.500 | 1.530 | 1.470 | 1.060 | 0.940 | 1 |
| 05 | 026 | 5/16 - 18 | 2.688 | 2.718 | 2.658 | 1.500 | 1.780 | 1.470 | 1.185 | 1.065 | 1 1/4 |
| 05 | 045 | 5/16 - 18 | 4.500 | 4.530 | 4.470 | 1.750 | 1.780 | 1.720 | 2.060 | 1.940 | 1 1/4 |
| 05 | 027 | 5/16 - 18 | 2.688 | 2.718 | 2.658 | 1.750 | 1.780 | 1.720 | 1.060 | 0.940 | 1 1/2 |
| 05 | 047 | 5/16 - 18 | 4.750 | 4.780 | 4.720 | 1.750 | 1.780 | 1.720 | 3.060 | 2.940 | 1 1/2 |
| 05 | 032 | 5/16 - 18 | 3.188 | 3.218 | 3.158 | 1.750 | 2.030 | 1.720 | 1.060 | 0.940 | 2 |
| 05 | 056 | 5/16 - 18 | 5.625 | 5.685 | 5.565 | 2.000 | 2.030 | 1.970 | 3.060 | 2.940 | 2 |
| 05 | 037 | 5/16 - 18 | 3.688 | 3.718 | 3.658 | 2.000 | 2.030 | 1.970 | 1.060 | 0.940 | 2 1/2 |
| 06 | 022 | 3/8 - 16 | 2.250 | 2.280 | 2.220 | 2.000 | 2.030 | 1.970 | 1.310 | 1.190 | 1/2 |
| 06 | 023 | 3/8 - 16 | 2.250 | 2.280 | 2.220 | 2.000 | 2.030 | 1.970 | 1.310 | 1.190 | 3/4 |
| 06 | 025 | 3/8 - 16 | 2.500 | 2.530 | 2.470 | 2.500 | 2.530 | 2.470 | 1.310 | 1.190 | 1 |
| 06 | 027 | 3/8 - 16 | 2.750 | 2.780 | 2.720 | 2.500 | 2.530 | 2.470 | 1.185 | 1.065 | 1 1/4 |
| 06 | 026 | 3/8 - 16 | 2.625 | 2.655 | 2.595 | 2.500 | 2.530 | 2.470 | 1.310 | 1.190 | 1 1/2 |
| 06 | 031 | 3/8 - 16 | 3.125 | 3.155 | 3.095 | 3.000 | 3.030 | 2.970 | 1.310 | 1.190 | 2 |
| 06 | 036 | 3/8 - 16 | 3.625 | 3.655 | 3.595 | 3.000 | 3.030 | 2.970 | 1.310 | 1.190 | 2 1/2 |
| 06 | 066 | 3/8 - 16 | 6.625 | 6.685 | 6.565 | 3.000 | 3.030 | 2.970 | 3.060 | 2.940 | 2 1/2 |
| 06 | 041 | 3/8 - 16 | 4.125 | 4.155 | 4.095 | 3.000 | 3.030 | 2.970 | 1.310 | 1.190 | 3 |
| 06 | 055 | 3/8 - 16 | 5.500 | 5.560 | 5.440 | 3.500 | 3.530 | 3.470 | 2.310 | 2.190 | 3 1/2 |
| 08 | 045 | 1/2 - 13 | 4.500 | 4.530 | 4.470 | 3.500 | 3.530 | 3.470 | 1.685 | 1.565 | 2 1/2 |
| 08 | 050 | 1/2 - 13 | 5.000 | 5.060 | 4.940 | 3.500 | 3.530 | 3.470 | 1.560 | 1.440 | 3 |
| 08 | 085 | 1/2 - 13 | 8.500 | 8.590 | 8.410 | 4.000 | 4.030 | 3.970 | 3.060 | 2.940 | 3 |
| 08 | 055 | 1/2 - 13 | 5.500 | 5.560 | 5.440 | 4.000 | 4.030 | 3.970 | 1.560 | 1.440 | 3 1/2 |
| 08 | 060 | 1/2 - 13 | 6.000 | 6.060 | 5.940 | 4.500 | 4.530 | 4.470 | 1.560 | 1.440 | 4 |
| 08 | 072 | 1/2 - 13 | 7.250 | 7.310 | 7.190 | 5.625 | 5.685 | 5.565 | 2.060 | 1.940 | 5 |
| 08 | 084 | 1/2 - 13 | 8.375 | 8.465 | 8.285 | 6.750 | 6.810 | 6.690 | 2.060 | 1.940 | 6 |
| 08 | 104 | 1/2 - 13 | 10.375 | 10.465 | 10.285 | 8.750 | 8.840 | 8.930 | 2.060 | 1.940 | 8 |
| 12 | 138 | 3/4 - 10 | 13.813 | 13.933 | 13.693 | 10.875 | 10.965 | 11.055 | 4.060 | 3.940 | 10 |
| 14 | 161 | 7/8 - 9 | 16.063 | 16.183 | 15.943 | 12.875 | 12.995 | 12.755 | 4.310 | 4.190 | 12 |
| 14 | 173 | 7/8 - 9 | 17.313 | 17.433 | 17.193 | 14.125 | 14.245 | 14.005 | 4.310 | 4.190 | 14 |
| 14 | 193 | 7/8 - 9 | 19.313 | 19.193 | 19.193 | 16.125 | 16.245 | 16.005 | 4.310 | 4.190 | 16 |
| 16 | 217 | 1 - 8 | 21.688 | 21.568 | 21.568 | 18.125 | 18.245 | 18.005 | 4.810 | 4.690 | 18 |
Notes :
- UNC Threads are standards for low strength materials, but UNF threads are usually available on special order.
- Dimension C should be measured at point 1/2L from the threaded end.