Material Strengths (Part 1)

Material strength for threaded fasteners and headed industrial fasteners from Elgin Fasteners Group is listed below by grade, type and class and separated into 60,000 psi, 75,000 psi and 120,000 psi.

Material Strength – 60,000 psi J82 60M or Grade 1 or Class 4.8

Size Dia. StressArea Tensile Str. Lbs Proof Load Str. Lbs DryPartsK=.2 Lubricated Parts K=.15
MinBreak Str. (in/lbs) MaxTorque Value (in/lbs) MinBreak Str, (in/lbs) MaxTorque Value (in/lbs)
8-32 0.1640 0.01400 840 462 20.7 11.4 15.5 8.5
10-24 0.1900 0.01750 1,050 578 29.9 16.5 22.4 12.3
10-32 0.1900 0.02000 1,200 660 34.2 18.8 25.7 14.1
1/4-20 0.2500 0.03180 1,908 1,049 71.6 39.4 53.7 29.5
1/4-28 0.2500 0.03637 2,182 1,200 81.8 45.0 61.4 33.8
5/16-18 0.3125 0.05240 3,144 1,729 147.4 81.1 110.5 60.8
5/16-24 0.3125 0.05800 3,480 1,914 163.1 89.7 122.3 67.3
3/8-16 0.3750 0.07750 4,650 2,558 261.6 143.9 196.2 107.9
3/8-24 0.3750 0.08780 5,268 2,897 296.3 163.0 222.2 122.2
7/16-14 0.4375 0.10630 6,378 3,508 418.6 230.2 313.9 172.7
7/16-20 0.4375 0.11870 7,122 3,917 467.4 257.1 350.5 192.8
M3.5×0.6 0.1380 0.01051 631 347 13.1 7.2 9.8 5.4
M4x0.7 0.1575 0.01349 809 445 19.1 10.5 14.3 7.9
M5x0.8 0.1970 0.02201 1,321 726 39.0 21.5 29.3 16.1
M6x1.0 0.2360 0.03116 1,869 1,028 66.2 36.4 49.6 27.3
M7x1.0 0.2755 0.04473 2,684 1,476 110.9 61.0 83.2 45.8
M8x1.25 0.3150 0.05673 3,404 1,872 160.8 88.5 120.6 66.3
M10x1.5 0.3940 0.08990 5,394 2,967 318.8 175.3 239.1 131.5
M12x1.75 0.4720 0.13067 7,840 4,312 555.1 305.3 416.3 229.0

Material Strength – 75,000 psi Grade 2 or Class 5.8

Size Dia. StressArea Tensile Str. Lbs Proof Load Str. Lbs DryParts K=.2 Lubricated Parts K=.15
Min Break Str. (in/lbs) Max Torque Value (in/lbs) Min Break Str, (in/lbs) Max Torque Value (in/lbs)
8.32 0.1640 0.01400 1,050 788 25.8 19.4 19.4 14.5
10-24 0.1900 0.01750 1,313 984 37.4 28.1 28.1 21.0
10-32 0.1900 0.02000 1,500 1,125 42.8 32.1 32.1 24.0
1/4-20 0.2500 0.03180 2,385 1,789 89.4 67.1 67.1 50.3
1/4-28 0.2500 0.03637 2,728 2,046 102.3 76.7 76.7 57.5
5/16-18 0.3125 0.05240 3,930 2,948 184.2 138.2 138.2 103.6
5/16-24 0.3125 0.05800 4,350 3,263 203.9 152.9 152.9 114.7
3/8-16 0.3750 0.07750 5,813 4,359 327.0 245.2 245.2 183.9
3/8-24 0.3750 0.08780 6,585 4,939 370.4 277.8 277.8 208.4
7/16-14 0.4375 0.10630 7,973 5,979 523.2 392.4 392.4 294.3
7/16-20 0.4375 0.11870 8,903 6,677 584.2 438.2 438.2 328.6
M3.5×0.6 0.1380 0.01051 788 591 16.3 12.2 12.2 9.2
M4x0.7 0.1575 0.01349 1,012 759 23.9 17.9 17.9 13.4
M5x0.8 0.1970 0.02201 1,651 1,238 48.8 36.6 36.6 27.4
M6x1.0 0.2360 0.03116 2,337 1,752 82.7 62.0 62.0 46.5
M7x1.0 0.2755 0.04473 3,355 2,516 138.6 104.0 104.0 78.0
M8x1.25 0.3150 0.05673 4,255 3,191 201.0 150.8 150.8 113.1
M10x1.5 0.3940 0.08990 6,743 5,057 398.5 298.9 298.9 224.1
M12x1.75 0.4720 0.13067 9,800 7,350 693.9 520.4 520.4 390.3

Material Strength – 120,000 psi J82 120M or Grade 5 or Grade 5.1 or J81 or J1237 Type 2 or Class 8.8

Size Dia. StressArea Tensile Str. Lbs Proof Load Str. Lbs DryParts K=.2 Lubricated Parts K=.15
Min Break Str. (in/lbs) Max Torque Value (in/lbs) Min Break Str, (in/lbs) Max Torque Value (in/lbs)
8-32 0.1640 0.01400 1,680 1,176 41.3 28.9 31.0 21.7
10-24 0.1900 0.01750 2,100 1,470 59.9 41.9 44.9 31.4
10-32 0.1900 0.02000 2,400 1,680 68.4 47.9 51.3 35.9
1/4-20 0.2500 0.03180 3,816 2,671 143.1 100.2 107.3 75.1
1/4-28 0.2500 0.03637 4,364 3,055 163.7 114.6 122.7 85.9
5/16-18 0.3125 0.05240 6,288 4,402 294.8 206.3 221.1 154.7
5/16-24 0.3125 0.05800 6,960 4,872 326.3 228.4 244.7 171.3
3/8-16 0.3750 0.07750 ,9300 6,510 523.1 366.2 392.3 274.6
3/8-24 0.3750 0.08780 10,536 7,375 592.7 414.9 444.5 311.1
7/16-14 0.4375 0.10630 12,756 8,929 837.1 586.0 627.8 439.5
7/16-20 0.4375 0.11870 14,244 9,971 934.8 654.3 701.1 490.8
M3.5×0.6 0.1380 0.01051 1,261 883 26.1 18.3 19.6 13.7
M4x0.7 0.1575 0.01349 1,619 1,133 38.2 26.8 28.7 20.1
M5x0.8 0.1970 0.02201 2,641 1,849 78.0 54.6 58.5 41.0
M6x1.0 0.2360 0.03116 3,739 2,617 132.3 92.6 99.3 69.5
M7x1.0 0.2755 0.04473 5,368 3,758 221.8 155.3 166.4 116.5
M8x1.25 0.3150 0.05673 6,808 4,765 321.7 225.2 241.2 168.9
M10x1.5 0.3940 0.08990 10,788 7,552 637.6 446.3 478.2 334.7
M12x1.75 0.4720 0.13067 15,680 10,976 1110.2 777.1 832.6 582.8