Material Strengths (Part 2)

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

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