| Heat Treated Alloy Steel Properties | |||||||||
| Screw Size | Tensile Load | Single Shear | Tightening Torque | Tensile Strength | Yield Strength * | Elongation * | Reduction of Area * | Hardness Scale | |
| (Pounds Min.) | Strength Of Body | (Inch Lbs.) | Min | ||||||
| (Lbs. Min) | UNRC | UNRF | (P.S.I. Min) | (P.S.I. Min)* | in 4D* | % Min | (Rockwell) | ||
| 4 | 880 | 950 | 8.0 | 8.0 | 145,000 | - | - | - | C39-C44 |
| 5 | 1150 | 1,150 | 12.0 | 13.0 | 145,000 | - | - | - | C39-C44 |
| 6 | 1320 | 1,400 | 15.0 | 17.0 | 145,000 | - | - | - | C39-C44 |
| 8 | 2030 | 2,000 | 30.0 | 31.0 | 145,000 | - | - | - | C39-C44 |
| 10 | 2540 | 2,700 | 40.0 | 45.0 | 145,000 | - | - | - | C39-C44 |
| 1/4 | 4610 | 4,700 | 100.0 | 110.0 | 145,000 | - | - | - | C39-C44 |
| 5/16 | 7600 | 7,300 | 200.0 | 220.0 | 145,000 | - | - | - | C39-C44 |
| 3/8 | 11200 | 10,600 | 350.0 | 400.0 | 145,000 | - | - | - | C39-C44 |
| 7/16 | 15400 | 14,400 | 560.0 | 625.0 | 145,000 | - | - | - | C39-C44 |
| 1/2 | 20600 | 18,850 | 850.0 | 1,000.0 | 145,000 | - | - | - | C39-C44 |
| 5/8 | 30500 | 29,450 | 1,700.0 | 1,900.0 | 135,000 | 153,000 | 8% | 35% | C37-C44 |
| 3/4 | 45100 | 42,400 | 3,000.0 | 3,200.0 | 135,000 | 153,000 | 8% | 35% | C37-C44 |
| * APPLIES TO MACHINED SPECIMENS ONLY | Because of the head critical configuration of these parts, the full size tensile loads are based on 80% of the minimum heat treated material strength (180 ksi for sizes 0.500 in. and smaller and 170 ksi for sizes larger than 0.500 in.) and the stress area for coarse thread screws. | ||||||||
| Stainless Steel Properties | |||||||||
| Screw Size | Tensile Load | Single Shear | Tightening Torque | Tensile Strength | Yield Strength * | Elongation * | Reduction of Area * | Hardness Scale | |
| (Pounds Min.) | Strength Of Body | (Inch Lbs.) | Min | ||||||
| (Lbs. Min) | UNRC | UNRF | (P.S.I. Min) | (P.S.I. Min)* | in 4D* | % Min | (Rockwell) | ||
| 4 | 460 | 440 | 6.0 | 6.6 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 5 | 600 | 550 | 8.9 | 9.3 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 6 | 690 | 670 | 11.0 | 12.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 8 | 1060 | 950 | 20.0 | 21.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 10 | 1330 | 1280 | 31.0 | 34.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 1/4 | 2420 | 2200 | 71.0 | 81.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 5/16 | 3980 | 3450 | 123.0 | 136.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 3/8 | 5890 | 4970 | 215.0 | 246.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 1/2 | 10800 | 8840 | 530.0 | 600.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| 5/8 | 17200 | 13800 | 1061.0 | 1200.0 | 90,000 | 58000 | 20% | 30% | B96-C33 |
| * APPLIES TO MACHINED SPECIMENS ONLY | |||||||||