The ASTM A490 is a specification for the bolts set by the ASTM International, a voluntary standards development organizations that sets technical standards for materials. ASTM A490 covers heavy hex structural bolts from 1/2 inch diameter through 1-1/2 inches diameter and are made of alloy steel. Find here the below ASTM A490 Bolt Torque Chart which provides the details of tension, torque and TPI for its specification bolts against their corresponding sizes.
| Bolt Size | TPI | Tension (lbs) | Tightening Torque Range (ft lbs) (Min - Max) | ||
|---|---|---|---|---|---|
| Min | Max | Lubricated | Plain | ||
| 1⁄2 | 13 | 15,000 | 18,000 | 63 - 75 | 125 - 150 |
| 5⁄8 | 11 | 24,000 | 29,000 | 125 - 151 | 250 - 302 |
| 3⁄4 | 10 | 35,000 | 42,000 | 219 - 263 | 438 - 525 |
| 7⁄8 | 9 | 49,000 | 59,000 | 357 - 430 | 715 - 860 |
| 1 | 8 | 64,000 | 77,000 | 533 - 642 | 1,067 - 1,283 |
| 11⁄8 | 7 | 80,000 | 96,000 | 750 - 900 | 1,500 - 1,800 |
| 11⁄4 | 7 | 102,000 | 122,000 | 1,063 - 1,271 | 2,125 - 2,542 |
| 13⁄8 | 6 | 121,000 | 145,000 | 1,386 - 1,661 | 2,773 - 3,323 |
| 11⁄2 | 6 | 148,000 | 178,000 | 1,850 - 2,225 | 3,700 - 4,450 |
ASTM A490 Bolt Torque Chart displays the range of torque against their corresponding bolt sizes.
