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Bolt Thread Dimensions: ISO COARSE
20 to 56
Bolt thread dimensions — UNC, UNF, ISO coarse/fine thread series with pitch, tensile stress area, and threads per inch
| thread series | nominal diameter | nominal size | pitch mm (mm) | tensile stress area in2 (in2) | tensile stress area mm2 (mm2) | threads per inch (threads/in) |
|---|---|---|---|---|---|---|
| ISO COARSE | 20 | M20 | 2.5 | 0.3798 | 245 | 10.16 |
| ISO COARSE | 22 | M22 | 2.5 | 0.4697 | 303 | 10.16 |
| ISO COARSE | 24 | M24 | 3 | 0.5472 | 353 | 8.47 |
| ISO COARSE | 27 | M27 | 3 | 0.7115 | 459 | 8.47 |
| ISO COARSE | 30 | M30 | 3.5 | 0.8696 | 561 | 7.26 |
| ISO COARSE | 33 | M33 | 3.5 | 1.0757 | 694 | 7.26 |
| ISO COARSE | 36 | M36 | 4 | 1.2664 | 817 | 6.35 |
| ISO COARSE | 42 | M42 | 4.5 | 1.7376 | 1,121 | 5.64 |
| ISO COARSE | 48 | M48 | 5 | 2.2832 | 1,473 | 5.08 |
| ISO COARSE | 56 | M56 | 5.5 | 3.1465 | 2,030 | 4.62 |
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