Engineering Information
Strengths of Coarse Threaded Shear Bolts
Shear Bolt Grade | Shear Bolt Size | Anticipated Failure Load | Maximum Horsepower* | ||||||||
Direct Shear Lbs. | Torque in Inch/Lbs. | 540 RPM | 1000 RPM | ||||||||
3-1/2'' Dia. Bolt Circle 6N, 12N, 14N | 4-1/4'' Dia. Bolt Circle 35N, 44R, 55N | 5-1/4” Dia. Bolt Circle 35N, 44R, 55N | 3-1/2'' Dia. Bolt Circle 6N, 12N, 14N | 4-1/4'' Dia. Bolt Circle 35N, 44R, 55N | 5-1/4” Dia Bolt Circle 35N, 44R, 55N | 3-1/2'' Dia. Bolt Circle 6N, 12N, 14N | 4-1/4'' Dia. Bolt Circle 35N, 44R, 55N | 5-1/4” Dia Bolt Circle 35N,44R,55N | |||
2 | 1/4 | 2798 | 4896 | 5946 | 7345 | 42 | 51 | 63 | 78 | 94 | 117 |
2 | 5/16 | 4372 | 7651 | 9290 | 11476 | 66 | 80 | 98 | 121 | 147 | 182 |
2 | 3/8 | 6295 | 11017 | 13378 | 16526 | 94 | 115 | 142 | 175 | 212 | 262 |
2 | 7/16 | 8569 | 14995 | 18209 | 22493 | 128 | 156 | 193 | 238 | 289 | 357 |
2 | 1/2 | 11192 | 19586 | 23783 | 29379 | 168 | 204 | 252 | 311 | 377 | 466 |
5 | 1/4 | 4516 | 7903 | 9597 | 11855 | 68 | 82 | 102 | 125 | 152 | 188 |
5 | 5/16 | 7056 | 12349 | 14995 | 18523 | 106 | 128 | 159 | 196 | 238 | 294 |
5 | 3/8 | 10161 | 17782 | 21592 | 26673 | 152 | 185 | 229 | 282 | 343 | 423 |
5 | 7/16 | 13830 | 24203 | 29390 | 36305 | 207 | 252 | 311 | 384 | 466 | 576 |
5 | 1/2 | 18064 | 31612 | 38386 | 47418 | 271 | 329 | 406 | 502 | 609 | 752 |
8 | 1/4 | 6381 | 11167 | 13560 | 16751 | 96 | 116 | 144 | 177 | 215 | 266 |
8 | 5/16 | 9971 | 17449 | 21188 | 26174 | 150 | 182 | 224 | 277 | 336 | 415 |
8 | 3/8 | 14358 | 25127 | 30511 | 37690 | 215 | 261 | 323 | 399 | 484 | 598 |
8 | 7/16 | 19543 | 34200 | 41529 | 51300 | 293 | 356 | 440 | 543 | 659 | 814 |
8 | 1/2 | 25525 | 44670 | 54242 | 67004 | 383 | 465 | 574 | 709 | 861 | 1063 |
These figures are based on SAE Minimum Tensile Strengths. Production bolts may be twenty percent stronger than these minimum specifications. Shear strength equals seventy-five percent of the tensile strength.
*Refer to Horsepower Rating Chart
Horsepower = (Torque (LB. FT.) X RPM) / 5262