A chart showing the standard torque ratings for common size fasteners
| TORQUE SPECIFICATIONS | ||||
| THREAD SIZE | SAE GRADE 5 75% YIELD STRENGTH (PSI) =69000 |
SAE GRADE 8 75% YIELD STRENGTH (PSI) = 98000 |
||
| PLAIN Ft. Lbs. |
ZINC PLATED Ft. Lbs. |
PLAIN Ft. Lbs. |
ZINC PLATED Ft. Lbs. |
|
| 1/4 - 20 | 9 | 10 | 13 | 14 |
| 1/4 - 28 | 10 | 12 | 15 | 16 |
| 5/16 - 18 | 19 | 21 | 27 | 29 |
| 5/16 - 24 | 21 | 23 | 30 | 33 |
| 3/8 - 16 | 33 | 37 | 47 | 52 |
| 3/8 - 24 | 38 | 42 | 54 | 59 |
| 7/16 - 14 | 53 | 59 | 76 | 83 |
| 7/16 - 24 | 60 | 66 | 85 | 93 |
| 1/2 - 13 | 82 | 90 | 116 | 127 |
| 1/2 - 20 | 92 | 101 | 131 | 144 |
| 9/16 - 12 | 118 | 129 | 167 | 184 |
| 9/16 - 18 | 131 | 144 | 186 | 205 |
| 5/8 - 11 | 162 | 179 | 231 | 254 |
| 5/8 - 14 | 184 | 202 | 261 | 287 |
| 3/4 - 10 | 288 | 317 | 409 | 450 |
| 3/4 - 16 | 322 | 354 | 457 | 503 |
Courtesy of Tom Woods
Category:
Tools