3 8 Bolt Shear Strength Grade 8

Nominal bolt diameter body shear area sq in gr 2 a307a b gr 5 a325 gr 8 a490 1 4 0 04908 2 179 2 1 766 9 3 533 8 4 417 2 5 16 0 07669 3 405 0 2 760 8 5 521 7.

3 8 bolt shear strength grade 8.

Proof load psi min. Bolt safe working loads lbs safe tensile load at 6 000 psi load. Grade 8 medium carbon alloy steel quenched and tempered up to. Grade 8 medium carbon alloy steel quenched and tempered.

Lead screws and nuts found in hand powered clamps vises grates doors and work tables lead screws and nuts have broad square threads that are well suited for quick assembly high clamping forces and lifting and lowering heavy objects. Grade 2 low carbon steel up to 3 4 proof load 55000 psi minimum tensile strength 74000 psi 3 4 1 1 2 proof load 33000 psi minimum tensile strength 66000 psi. There exists an often quoted myth that grade 5 bolts are better in shear than grade 8 since they will bend before breaking. Robert the breaking load of your bolt can be measured in two ways shear and tensile.

Head marking grade and material nominal size range inches mechanical properties. This information is derived from data here. For a 3 8 grade 8 bolt the shear would be 6 975lbs and the tensile would be 11 625lbs. Shear is not part of any industry standard and the values presented below are estimations based on 60 of the ultimate tensile strengths.

Shear strength of alloy steel is approximately 60 of its ultimate tensile strength. 1 4 thru 1 1 2 120 000. We don t have a good way to measure the bending point nor can we account for all the variables at play but the tensile and shear values should help. Medium strength steel coupling nuts include grade 5 and class 8 coupling nuts.

Print this page. Shear strengths of bolts by diameter. Safe shear strength at 7500 psi load. Grade 5 medium carbon steel quenched and tempered up to 1 proof load 85000 psi 1 1 1 2 proof load 74000 psi minimum tensile strength 105000 psi.

Reference to table 1 shows that the yield strength of a grade 8 bolt is higher than the ultimate strength of a grade 5 bolt.