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