TORQUE ASTM A354-BD / SAE GRADE 8
| Bolt Size | TPI | Proof Load (lbs) | Clamp Load (lbs) | Tightening Torque (ft lbs) Lubricated | Tightening Torque (ft lbs) Plain |
|---|---|---|---|---|---|
| 1/4" | 20 | 3,800 | 2,850 | 6 | 12 |
| 5/16" | 18 | 6,300 | 4,725 | 12 | 25 |
| 3/8" | 16 | 9,300 | 6,975 | 22 | 44 |
| 7/16" | 14 | 12,750 | 9,563 | 35 | 70 |
| 1/2" | 13 | 17,050 | 12,788 | 53 | 107 |
| 9/16" | 12 | 21,850 | 16,388 | 77 | 154 |
| 5/8" | 11 | 27,100 | 20,325 | 106 | 212 |
| 3/4" | 10 | 40,100 | 30,075 | 188 | 376 |
| 7/8" | 9 | 55,450 | 41,588 | 303 | 606 |
| 1" | 8 | 72,700 | 54,525 | 454 | 909 |
| 1 1/8" | 7 | 91,550 | 68,663 | 644 | 1,287 |
| 1 1/4" | 7 | 120,000 | 90,000 | 938 | 1,875 |
| 1 3/8" | 6 | 138,600 | 103,950 | 1,191 | 2,382 |
| 1 1/2" | 6 | 168,600 | 126,450 | 1,581 | 3,161 |
| 1 3/4" | 5 | 228,000 | 171,000 | 2,494 | 4,988 |
| 2" | 4 1/2 | 300,000 | 225,000 | 3,750 | 7,500 |
| 2 1/4" | 4 1/2 | 390,000 | 292,500 | 5,484 | 10,969 |
| 2 1/2" | 4 | 480,000 | 360,000 | 7,500 | 15,000 |
| 2 3/4" | 4 | 517,650 | 388,238 | 8,897 | 17,794 |
| 3" | 4 | 626,850 | 470,138 | 11,753 | 23,507 |
| 3 1/4" | 4 | 745,500 | 559,125 | 15,143 | 30,286 |
| 3 1/2" | 4 | 874,650 | 655,988 | 19,133 | 38,266 |
| 3 3/4" | 4 | 1,014,300 | 760,725 | 23,773 | 47,545 |
| 4" | 4 | 1,163,400 | 872,550 | 29,085 | 58,100 |