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Bolt Thread Dimensions: UNF
1.125 to 1.5
Bolt thread dimensions — UNC, UNF, ISO coarse/fine thread series with pitch, tensile stress area, and threads per inch
| thread series | nominal diameter | gross area in2 (in2) | minor diameter in (in) | nominal size | pitch mm (mm) | root area in2 (in2) | tensile stress area in2 (in2) | tensile stress area mm2 (mm2) | threads per inch (threads/in) |
|---|---|---|---|---|---|---|---|---|---|
| UNF | 1.125 | 0.994 | 1.0348 | 1-1/8 | 2.1167 | 0.6846 | 0.8557 | 552.06 | 12 |
| UNF | 1.25 | 1.2272 | 1.1598 | 1-1/4 | 2.1167 | 0.8583 | 1.0729 | 692.19 | 12 |
| UNF | 1.375 | 1.4849 | 1.2848 | 1-3/8 | 2.1167 | 1.0518 | 1.3147 | 848.19 | 12 |
| UNF | 1.5 | 1.7671 | 1.4098 | 1-1/2 | 2.1167 | 1.2648 | 1.581 | 1,020 | 12 |
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