| Alloy Steel Properties | ||||||||||||
| Screw Size | Tensile Load | Proof Load | Single Shear | Tightening Torque | Tensile Strength | Yield Strength * | Elongation * | Reduction of Area * | Hardness Scale | |||
| (Pounds Min.) | (Pounds Min.) | Strength Of Body | (Inch Lbs.) | Min | ||||||||
| UNRC | UNRF | UNRC | UNRF | (Lbs. Min) | UNRC | UNRF | (P.S.I. Min) | (P.S.I. Min)* | in 4D* | % Min | (Rockwell) | |
| 0 | - | 324 | - | 252 | 305 | - | 2.6 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 1 | 473 | 500 | 368 | 389 | 450 | 4.5 | 4.8 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 2 | 666 | 709 | 518 | 552 | 625 | 7.5 | 8.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 3 | 877 | 941 | 682 | 732 | 830 | 11.0 | 12.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 4 | 1,090 | 1,190 | 846 | 925 | 1,060 | 16.0 | 18.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 5 | 1,430 | 1,490 | 1,110 | 1,160 | 1,325 | 24.0 | 24.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 6 | 1,640 | 1,830 | 1,270 | 1,420 | 1,615 | 30.0 | 34.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 8 | 2,520 | 2,650 | 1,960 | 2,060 | 2,280 | 55.0 | 58.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 10 | 3,150 | 3,600 | 2,450 | 2,800 | 3,060 | 79.0 | 90.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 1/4 | 5,730 | 6,500 | 4,450 | 5,100 | 5,295 | 200.0 | 230.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 5/16 | 9,440 | 10,400 | 7,340 | 8,120 | 8,285 | 415.0 | 460.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 3/8 | 13,900 | 15,800 | 10,800 | 12,300 | 11,910 | 740.0 | 845.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 7/16 | 19,100 | 21,400 | 14,900 | 16,600 | 16,200 | 1,190.0 | 1,305.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 1/2 | 25,500 | 28,800 | 19,900 | 22,400 | 21,175 | 1,800.0 | 2,065.0 | 180000 | 162000 | 10% | 33% | C39-C45 |
| 5/8 | 38,400 | 43,500 | 30,500 | 34,600 | 31,300 | 3,400.0 | 3,800.0 | 170000 | 153000 | 10% | 33% | C37-C45 |
| 3/4 | 56,800 | 63,400 | 45,100 | 50,400 | 45,050 | 6,000.0 | 6,750.0 | 170000 | 153000 | 10% | 33% | C37-C45 |
| 7/8 | 78,500 | 86,500 | 62,400 | 68,700 | 61,350 | 8,250.0 | 9,200.0 | 170000 | 153000 | 10% | 33% | C37-C45 |
| 1 | 103,000 | 113,000 | 81,800 | 89,500 | 80,100 | 12,500.0 | 13,000.0 | 170000 | 153000 | 10% | 33% | C37-C45 |
| 1 1/4 | 165,000 | 182,000 | 131,100 | 145,000 | 125,100 | 25,000.0 | 27,750.0 | 170000 | 153000 | 10% | 33% | C37-C45 |
| 1 1/2 | 239,000 | 269,000 | 190,000 | 213,000 | 180,200 | 43,500.0 | 49,000.0 | 170000 | 153000 | 10% | 33% | C37-C45 |
| * APPLIES TO MACHINED SPECIMENS ONLY | A - Values based on 180 ksi for sizes 0.500 in. and smaller and 170 ksi for sizes larger than 0.500 in. | |||||||||||
| Stainless Steel Properties | ||||||||||||
| Screw Size | Tensile Load | Proof Load | Single Shear | Tightening Torque | Tensile Strength | Yield Strength * | Elongation * | Reduction of Area * | Hardness Scale | |||
| (Pounds Min.) | (Pounds Min.) | Strength Of Body | (Inch Lbs.) | Min | ||||||||
| UNRC | UNRF | UNRC | UNRF | (Lbs. Min) | UNRC | UNRF | (P.S.I. Min) | (P.S.I. Min)* | in 4D* | % Min | (Rockwell) | |
| 2 | 350 | 375 | 0.4D | 260 | 3.8 | 4.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 4 | 575 | 630 | 0.4D | 440 | 6.8 | 9.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 6 | 865 | 965 | 0.4D | 670 | 15.0 | 17.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 8 | 1,330 | 1,440 | 0.4D | 950 | 28.0 | 29.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 10 | 1,600 | 1,990 | 0.4D | 1280 | 40.0 | 46.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 1/4 | 3,420 | 3,460 | 0.4D | 2,200 | 95.0 | 109.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 5/16 | 4,980 | 5,570 | 0.4D | 3,450 | 170.0 | 188.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 3/8 | 7,360 | 8,340 | 0.4D | 4,970 | 301.0 | 341.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| 1/2 | 13,500 | 15,200 | 0.4D | 8,840 | 750.0 | 850.0 | 95000 | 30000 | 10% | 30% | B80-C33 | |
| * APPLIES TO MACHINED SPECIMENS ONLY | ||||||||||||