Metric Fine Thread Dimensions conform to ISO 724. As engineering reference, they are specified by the dimensions in the table below; this page also covers materials, finishes and typical uses.
About This Reference
This is an engineering reference table for metric fine thread dimensions based on ISO 724. Use it alongside our fastener catalog when selecting and specifying parts.
Reference Data (ISO 724)
| Size x Pitch | Pitch (mm) | Pitch diameter d2/D2 (mm) | Minor dia external d3 (mm) | Minor dia internal D1 (mm) | Stress area (mm2) | Reference standard |
|---|---|---|---|---|---|---|
| M8x1 | 1.0 | 7.35 | 6.773 | 6.917 | 39.2 | ISO 724 fine thread |
| M8x0.75 | 0.75 | 7.513 | 7.08 | 7.188 | 44.2 | ISO 724 fine thread |
| M10x1.25 | 1.25 | 9.188 | 8.466 | 8.647 | 61.2 | ISO 724 fine thread |
| M10x1.0 | 1.0 | 9.35 | 8.773 | 8.917 | 64.5 | ISO 724 fine thread |
| M10x0.75 | 0.75 | 9.513 | 9.08 | 9.188 | 72.7 | ISO 724 fine thread |
| M12x1.5 | 1.5 | 11.026 | 10.16 | 10.376 | 88.1 | ISO 724 fine thread |
| M12x1.25 | 1.25 | 11.188 | 10.466 | 10.647 | 92.1 | ISO 724 fine thread |
| M12x1.0 | 1.0 | 11.35 | 10.773 | 10.917 | 98.0 | ISO 724 fine thread |
| M14x1.5 | 1.5 | 13.026 | 12.16 | 12.376 | 125.0 | ISO 724 fine thread |
| M14x1.25 | 1.25 | 13.188 | 12.466 | 12.647 | 131.0 | ISO 724 fine thread |
| M16x1.5 | 1.5 | 15.026 | 14.16 | 14.376 | 167.0 | ISO 724 fine thread |
| M16x1.0 | 1.0 | 15.35 | 14.773 | 14.917 | 182.0 | ISO 724 fine thread |
| M18x2.0 | 2.0 | 16.701 | 15.546 | 15.835 | 216.0 | ISO 724 fine thread |
| M18x1.5 | 1.5 | 17.026 | 16.16 | 16.376 | 232.0 | ISO 724 fine thread |
| M18x1.0 | 1.0 | 17.35 | 16.773 | 16.917 | 250.0 | ISO 724 fine thread |
| M20x2.0 | 2.0 | 18.701 | 17.546 | 17.835 | 272.0 | ISO 724 fine thread |
| M20x1.5 | 1.5 | 19.026 | 18.16 | 18.376 | 290.0 | ISO 724 fine thread |
| M20x1.0 | 1.0 | 19.35 | 18.773 | 18.917 | 311.0 | ISO 724 fine thread |
| M22x2.0 | 2.0 | 20.701 | 19.546 | 19.835 | 333.0 | ISO 724 fine thread |
| M22x1.5 | 1.5 | 21.026 | 20.16 | 20.376 | 353.0 | ISO 724 fine thread |
| M24x2.0 | 2.0 | 22.701 | 21.546 | 21.835 | 384.0 | ISO 724 fine thread |
| M24x1.5 | 1.5 | 23.026 | 22.16 | 22.376 | 407.0 | ISO 724 fine thread |
| M27x2.0 | 2.0 | 25.701 | 24.546 | 24.835 | 496.0 | ISO 724 fine thread |
| M30x2.0 | 2.0 | 28.701 | 27.546 | 27.835 | 621.0 | ISO 724 fine thread |
| M30x1.5 | 1.5 | 29.026 | 28.16 | 28.376 | 647.0 | ISO 724 fine thread |
| M33x2.0 | 2.0 | 31.701 | 30.546 | 30.835 | 761.0 | ISO 724 fine thread |
| M36x3.0 | 3.0 | 34.051 | 32.319 | 32.752 | 865.0 | ISO 724 fine thread |
| M36x2.0 | 2.0 | 34.701 | 33.546 | 33.835 | 915.0 | ISO 724 fine thread |
| M39x3.0 | 3.0 | 37.051 | 35.319 | 35.752 | 1030.0 | ISO 724 fine thread |
| M42x3.0 | 3.0 | 40.051 | 38.319 | 38.752 | 1210.0 | ISO 724 fine thread |
| M45x3.0 | 3.0 | 43.051 | 41.319 | 41.752 | 1410.0 | ISO 724 fine thread |
| M48x3.0 | 3.0 | 46.051 | 44.319 | 44.752 | 1600.0 | ISO 724 fine thread |
| M52x3.0 | 3.0 | 50.051 | 48.319 | 48.752 | 1900.0 | ISO 724 fine thread |
| M56x4.0 | 4.0 | 53.402 | 51.093 | 51.67 | 2180.0 | ISO 724 fine thread |
| M60x4.0 | 4.0 | 57.402 | 55.093 | 55.67 | 2520.0 | ISO 724 fine thread |
| M64x4.0 | 4.0 | 61.402 | 59.093 | 59.67 | 2850.0 | ISO 724 fine thread |