Lag Bolt Shear Strength - How To Discuss
Ava Robinson
Published May 20, 2026
Lag Bolt Shear Strength
How much weight can a tie rod hold in a pin?
A single 1/4 grade 5 lag screw in a configuration like this will fail at approximately 13,000kg. Even 1/8 ply screws (very low in numbered screw sizes) have a shear strength greater than 3000 lbs.With that in mind, how much weight can the bolt hold?
Finding a Nail A drywall nail can't hold more than a few pounds, but a thin nail in a wooden stud can generally hold up to 20 pounds, and several coarse wood screws in wooden studs can generally hold up to 100 pounds. Kilograms or more.Second, how much weight can a 1/2 screw carry?
SAE bolt strengthBolt resistant working loads (kg) (safe tensile load at 6000 psi load) (safe shear strength at 7500 psi load)Bolt Dia (inch) NF Class 2 threaded iron screw
| 1/4 | 200 | 370 |
| 5/16 | 340 | 575 |
| 3/8 | 510 | 830 |