Material Strengths for Standard & Specialty Fasteners
Material strength for threaded fasteners and headed industrial fasteners 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 | Diameter | Stress Area | Tensile Str. (lbs) | Proof Load Str. (lbs) | Dry Parts K=.2 - Min Break Str. (in/lbs) | Dry Parts K=.2 - Max Torque Value (in/lbs) | Lubricated Parts K=.15 - Min Break Str. (in/lbs) | Lubricated Parts K=.15 - Max Torque 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 | Diameter | Stress Area | Tensile Str. (lbs) | Proof Load Str. (lbs) | Dry Parts K=.2 - Min Break Str. (in/lbs) | Dry Parts K=.2 - Max Torque Value (in/lbs) | Lubricated Parts K=.15 - Min Break Str. (in/lbs) | Lubricated Parts K=.15 - 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 | Diameter | Stress Area | Tensile Str. (lbs) | Proof Load Str. (lbs) | Dry Parts K=.2 - Min Break Str. (in/lbs) | Dry Parts K=.2 - Max Torque Value (in/lbs) | Lubricated Parts K=.15 - Min Break Str. (in/lbs) | Lubricated Parts K=.15 - 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 |
