Thread Information
| Size | Thread | Male OD in | Male OD mm | Thread Form TPI | Thread TPI | unit | TPI inch | TPI mm |
| M4 | ISO | 0.157 | 4 | M4x0.7 | 0.7 | mm | 36.3 | 0.7 |
| M5 | ISO | 0.197 | 5 | M5x0.8 | 0.8 | mm | 31.8 | 0.8 |
| M6 | ISO | 0.236 | 6 | M6X0.75 | 0.75 | mm | 33.9 | 0.75 |
| M6 | ISO | 0.236 | 6 | M6X1.0 | 1 | mm | 25.4 | 1 |
| M7 | ISO | 0.276 | 7 | M7x1.0 | 1 | mm | 25.4 | 1 |
| -1 | NPT | 0.306 | 7.77 | 1/16-27 | 27 | in | 27 | 1.06 |
| -2 | JIC | 0.312 | 7.92 | 5/16-24 | 24 | in | 24 | 0.94 |
| -3 | NTA | 0.312 | 7.92 | 5/16-24 | 24 | in | 24 | 0.94 |
| -2 | Comp | 0.313 | 7.94 | 5/16-24 | 24 | in | 24 | 0.94 |
| M8 | ISO | 0.315 | 8 | M8X1.0 | 1 | mm | 25.4 | 1 |
| -2 | BSP | 0.375 | 9.53 | 1/8-28 | 28 | in | 28 | 1.1 |
| -3 | JIC | 0.375 | 9.53 | 3/8-24 | 24 | in | 24 | 0.94 |
| -3 | Comp | 0.375 | 9.53 | 3/8-24 | 24 | in | 24 | 0.94 |
| M10 | ISO | 0.394 | 10 | M10X1.0 | 1 | mm | 25.4 | 1 |
| M10 | ISO | 0.394 | 10 | M10X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -2 | NPT | 0.406 | 10.32 | 1/8-27 | 27 | in | 27 | 1.06 |
| -4 | JIC | 0.438 | 11.11 | 7/16-20 | 20 | in | 20 | 0.79 |
| -4 | NTA | 0.438 | 11.11 | 7/16-24 | 24 | in | 24 | 0.94 |
| -4 | Comp | 0.438 | 11.11 | 7/16-24 | 24 | in | 24 | 0.94 |
| M12 | ISO | 0.472 | 12 | M12X1.0 | 1 | mm | 25.4 | 1 |
| M12 | ISO | 0.472 | 12 | M12X1.25 | 1.25 | mm | 20.3 | 1.25 |
| M12 | ISO | 0.472 | 12 | M12X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -5 | JIC | 0.5 | 12.7 | 1/2-20 | 20 | in | 20 | 0.79 |
| -5 | Comp | 0.5 | 12.7 | 1/2-24 | 24 | in | 24 | 0.94 |
| -4 | BSP | 0.531 | 13.49 | 1/4-19 | 19 | in | 19 | 0.75 |
| -6 | NTA | 0.531 | 13.49 | 17/32-24 | 24 | in | 24 | 0.94 |
| M14 | ISO | 0.551 | 14 | M14X1.0 | 1 | mm | 25.4 | 1 |
| M14 | ISO | 0.551 | 14 | M14X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -6 | JIC | 0.563 | 14.29 | 9/16-18 | 18 | in | 18 | 0.71 |
| -6 | Comp | 0.563 | 14.29 | 9/16-24 | 24 | in | 24 | 0.94 |
| -7 | Comp | 0.625 | 15.88 | 5/8-24 | 24 | in | 24 | 0.94 |
| M16 | ISO | 0.63 | 16 | M16X1.0 | 1 | mm | 25.4 | 1 |
| M16 | ISO | 0.63 | 16 | M16X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -6 | BSP | 0.656 | 16.67 | 3/8-19 | 19 | in | 19 | 0.75 |
| -4 | NPT | 0.688 | 17.46 | 1/4-18 | 18 | in | 18 | 0.71 |
| -6 | NPT | 0.688 | 17.46 | 3/8-18 | 18 | in | 18 | 0.71 |
| -8 | NTA | 0.688 | 17.46 | 11/16-20 | 20 | in | 20 | 0.79 |
| -8 | Comp | 0.688 | 17.46 | 11/16-20 | 20 | in | 20 | 0.79 |
| M18 | ISO | 0.709 | 18 | M18X1.5 | 1.5 | mm | 16.9 | 1.5 |
| 8 | JIC | –0.75 | 19.05 | 3/4-16 | 16 | in | 16 | 0.63 |
| ¾ | J1402 | 0.75 | 19.05 | 3/4-20 | 20 | in | 20 | 0.79 |
| M20 | ISO | 0.787 | 20 | M20X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -8 | BSP | 0.813 | 20.64 | 8-14 | 14 | in | 14 | 0.55 |
| -10 | NTA | 0.813 | 20.64 | 13/16-18 | 18 | in | 18 | 0.71 |
| -10 | Comp | 0.813 | 20.64 | 13/16-18 | 18 | in | 18 | 0.71 |
| -8 | NPT | 0.844 | 21.43 | 1/2-14 | 14 | in | 14 | 0.55 |
| M22 | ISO | 0.866 | 22 | M22X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -10 | JIC | 0.875 | 22.23 | 7/8-14 | 14 | in | 14 | 0.55 |
| 7/8 | J1402 | 0.875 | 22.23 | 7/8-20 | 20 | in | 20 | 0.79 |
| -10 | BSP | 0.906 | 23.02 | 5/8-14 | 14 | in | 14 | 0.55 |
| M24 | ISO | 0.945 | 24 | M24X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -12 | NTA | 1 | 25.4 | 1-18 | 18 | in | 18 | 0.71 |
| -12 | Comp | 1 | 25.4 | 1-18 | 18 | in | 18 | 0.71 |
| M26 | ISO | 1.024 | 26 | M26X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -12 | BSP | 1.031 | 26.19 | 3/4-14 | 14 | in | 14 | 0.55 |
| -12 | NPT | 1.063 | 26.99 | 3/4-14 | 14 | in | 14 | 0.55 |
| -12 | JIC | 1.063 | 26.99 | 1-1/16-12 | 12 | in | 12 | 0.47 |
| M27 | ISO | 1.063 | 27 | M27X2.0 | 2 | mm | 12.7 | 2 |
| -14 | Comp | 1.125 | 28.58 | 1-1/8-18 | 18 | in | 18 | 0.71 |
| M30 | ISO | 1.181 | 30 | M30X1.5 | 1.5 | mm | 16.9 | 1.5 |
| M30 | ISO | 1.181 | 30 | M30X2.0 | 2 | mm | 12.7 | 2 |
| M33 | ISO | 1.299 | 33 | M33X1.5 | 1.5 | mm | 16.9 | 1.5 |
| M33 | ISO | 1.299 | 33 | M33X2.0 | 2 | mm | 12.7 | 2 |
| -16 | NPT | 1.313 | 33.34 | 1-11.5 | 11.5 | in | 11.5 | 0.45 |
| -16 | BSP | 1.313 | 33.34 | 1-11 | 11 | in | 11 | 0.43 |
| -16 | JIC | 1.313 | 33.34 | 1-5/16-12 | 12 | in | 12 | 0.47 |
| M36 | ISO | 1.417 | 36 | M36X1.5 | 1.5 | mm | 16.9 | 1.5 |
| M36 | ISO | 1.417 | 36 | M36X2.0 | 2 | mm | 12.7 | 2 |
| M38 | ISO | 1.496 | 38 | M38 | 38 | in | 38 | 1.5 |
| M40 | ISO | 1.575 | 40 | M40X1.5 | 40 | in | 40 | 1.57 |
| -20 | JIC | 1.625 | 41.28 | 1-5/8-12 | 12 | in | 12 | 0.47 |
| M42 | ISO | 1.654 | 42 | M42X2.0 | 2 | mm | 12.7 | 2 |
| -20 | BSP | 1.656 | 42.07 | 1-1/4-11 | 11 | in | 11 | 0.43 |
| -20 | NPT | 1.688 | 42.86 | 1-1/4-11.5 | 1.5 | mm | 16.9 | 1.5 |
| M45 | ISO | 1.772 | 45 | M45X1.5 | 1.5 | mm | 16.9 | 1.5 |
| M45 | ISO | 1.772 | 45 | M45X2.0 | 2 | mm | 12.7 | 2 |
| -24 | BSP | 1.875 | 47.63 | 1-1/2-11 | 11 | in | 11 | 0.43 |
| -24 | JIC | 1.875 | 47.63 | 1-7/8-12 | 12 | in | 12 | 0.47 |
| M48 | ISO | 1.89 | 48 | M48X1.5 | 1.5 | mm | 16.9 | 1.5 |
| -24 | NPT | 1.906 | 48.42 | 1-1/2-11.5 | 11.5 | in | 11.5 | 0.45 |
| M52 | ISO | 2.047 | 52 | M52X2.0 | 2 | mm | 12.7 | 2 |
| -32 | BSP | 2.344 | 59.53 | 2-11 | 11 | in | 11 | 0.43 |
| M60 | ISO | 2.362 | 60 | M60 | 4 | mm | 6.4 | 4 |
| -32 | NPT | 2.375 | 60.33 | 2-11.5 | 11.5 | in | 11.5 | 0.45 |
| -32 | JIC | 2.5 | 63.5 | 2-1/2-12 | 12 | in | 12 | 0.47 |
| -40 | NPT | 2.875 | 73.03 | 2-1/2-8 | 8 | in | 8 | 0.31 |
| -40 | BSP | 2.96 | 75.18 | 2-1/2-11 | 11 | in | 11 | 0.43 |
| -40 | JIC | 3 | 76.2 | 3-12 | 12 | in | 12 | 0.47 |
| -48 | JIC | 3.5 | 88.9 | 3-1/2-12 | 12 | in | 12 | 0.47 |
