Material strength for specialty fasteners and long length fasteners from Elgin Fastener Group, as well as machine screws, is listed below by grade, type and class and is separated into 130,000 psi and 150,000.
Material Strength – 130,000 psi Class 9.8 |
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| Size | Dia. | StressArea | TensileStr.Lbs | ProofLoad Str.Lbs | DryPartsK=.2 | LubricatedParts K=.15 | ||
| MinBreak Str. (in/lbs) | MaxTorque Value (in/lbs) | MinBreak Str, (in/lbs) | MaxTorqueValue (in/lbs) | |||||
| 8-32 | 0.1640 | 0.01400 | 1,820 | 1,274 | 44.8 | 31.3 | 33.6 | 23.5 |
| 10-24 | 0.1900 | 0.01750 | 2,275 | 1,593 | 64.8 | 45.4 | 48.6 | 34.0 |
| 10-32 | 0.1900 | 0.02000 | 2,600 | 1,820 | 74.1 | 51.9 | 55.6 | 38.9 |
| 1/4-20 | 0.2500 | 0.03180 | 4,134 | 2,894 | 155.0 | 108.5 | 116.3 | 81.4 |
| 1/4-28 | 0.2500 | 0.03637 | 4,728 | 3,310 | 177.3 | 124.1 | 133.0 | 93.1 |
| 5/16-18 | 0.3125 | 0.05240 | 6,812 | 4,768 | 319.3 | 223.5 | 239.5 | 167.6 |
| 5/16-24 | 0.3125 | 0.05800 | 7,540 | 5,278 | 353.4 | 247.4 | 265.1 | 185.6 |
| 3/8-16 | 0.3750 | 0.07750 | 10,075 | 7,053 | 566.7 | 396.7 | 425.0 | 297.5 |
| 3/8-24 | 0.3750 | 0.08780 | 11,414 | 7,990 | 642.0 | 449.4 | 481.5 | 337.1 |
| 7/16-14 | 0.4375 | 0.10630 | 13,819 | 9,673 | 906.9 | 634.8 | 680.2 | 476.1 |
| 7/16-20 | 0.4375 | 0.11870 | 15,431 | 10,802 | 1012.7 | 708.9 | 759.5 | 531.6 |
| M3.5×0.6 | 0.1380 | 0.01051 | 1,366 | 956 | 28.3 | 19.8 | 21.2 | 14.8 |
| M4x0.7 | 0.1575 | 0.01349 | 1,754 | 1,228 | 41.4 | 29.0 | 31.1 | 21.8 |
| M5x0.8 | 0.1970 | 0.02201 | 2,861 | 2,003 | 84.6 | 59.2 | 63.4 | 44.4 |
| M6x1.0 | 0.2360 | 0.03116 | 4,050 | 2,835 | 143.4 | 100.4 | 107.5 | 75.3 |
| M7x1.0 | 0.2755 | 0.04473 | ,5815 | 4,071 | 240.3 | 168.2 | 180.2 | 126.2 |
| M8x1.25 | 0.3150 | 0.05673 | 7,375 | 5,162 | 348.5 | 243.9 | 261.3 | 182.9 |
| M10x1.5 | 0.3940 | 0.08990 | 11,687 | 8,181 | 690.7 | 483.5 | 518.0 | 362.6 |
| M12x1.75 | 0.4720 | 0.13067 | 16,987 | 11,891 | 1202.7 | 841.9 | 902.0 | 631.4 |
| Material Strength – 150,000 psi Class 10.9 or Grade 8 | ||||||||
| Size | Dia. | StressArea | TensileStr.Lbs | ProofLoad Str.Lbs | DryPartsK=.2 | LubricatedParts K=.15 | ||
| MinBreak Str. (in/lbs) | MaxTorque Value (in/lbs) | MinBreak Str, (in/lbs) | MaxTorqueValue (in/lbs) | |||||
| 8-32 | 0.1640 | 0.01400 | 2,100 | 1,680 | 51.7 | 41.3 | 38.7 | 31.0 |
| 10-24 | 0.1900 | 0.01750 | 2,625 | 2,100 | 74.8 | 59.9 | 56.1 | 44.9 |
| 10-32 | 0.1900 | 0.02000 | 3,000 | 2,400 | 85.5 | 68.4 | 64.1 | 51.3 |
| 1/4-20 | 0.2500 | 0.03180 | 4,770 | 3,816 | 178.9 | 143.1 | 134.2 | 107.3 |
| 1/4-28 | 0.2500 | 0.03637 | 5,456 | 4,364 | 204.6 | 163.7 | 153.4 | 122.7 |
| 5/16-18 | 0.3125 | 0.05240 | 7,860 | 6,288 | 368.4 | 294.8 | 276.3 | 221.1 |
| 5/16-24 | 0.3125 | 0.05800 | 8,700 | 6,960 | 407.8 | 326.3 | 305.9 | 244.7 |
| 3/8-16 | 0.3750 | 0.07750 | 11,625 | 9,300 | 653.9 | 523.1 | 490.4 | 392.3 |
| 3/8-24 | 0.3750 | 0.08780 | 13,170 | 10,536 | 740.8 | 592.7 | 555.6 | 444.5 |
| 7/16-14 | 0.4375 | 0.10630 | 15,945 | 12,756 | 1046.4 | 837.1 | 784.8 | 627.8 |
| 7/16-20 | 0.4375 | 0.11870 | 17,805 | 14,244 | 1168.5 | 934.8 | 876.3 | 701.1 |
| M3.5×0.6 | 0.1380 | 0.01051 | 1,577 | 1,261 | 32.6 | 26.1 | 24.5 | 19.6 |
| M4x0.7 | 0.1575 | 0.01349 | 2,024 | 1,619 | 47.8 | 38.2 | 35.9 | 28.7 |
| M5x0.8 | 0.1970 | 0.02201 | 3,302 | 2,641 | 97.6 | 78.0 | 73.2 | 58.5 |
| M6x1.0 | 0.2360 | 0.03116 | 4,673 | 3,739 | 165.4 | 132.3 | 124.1 | 99.3 |
| M7x1.0 | 0.2755 | 0.04473 | 6,710 | 5,368 | 277.3 | 221.8 | 208.0 | 166.4 |
| M8x1.25 | 0.3150 | 0.05673 | 8,510 | 6,808 | 402.1 | 321.7 | 301.6 | 241.2 |
| M10x1.5 | 0.3940 | 0.08990 | 13,485 | 10,788 | 797.0 | 637.6 | 597.7 | 478.2 |
| M12x1.75 | 0.4720 | 0.13067 | 19,601 | 15,680 | 1387.7 | 1110.2 | 1040.8 | 832.6 |