The pitch of a fastener refers to the distance between threads. This guide explains the different pitches available at different sizes of metric fastener.
| Diameter | Metric Coarse Pitch (mm) | Metric Fine Pitch (mm) |
|---|---|---|
| M0.3 | 0.08 | - |
| M0.35 | 0.09 | - |
| M0.4 | 0.1 | - |
| M0.45 | 0.1 | - |
| M0.5 | 0.125 | - |
| M0.55 | 0.125 | - |
| M0.6 | 0.15 | - |
| M0.7 | 0.175 | - |
| M0.8 | 0.2 | - |
| M0.9 | 0.225 | - |
| M1 | 0.25 | 0.2 |
| M1.1 | 0.25 | 0.2 |
| M1.2 | 0.25 | 0.2 |
| M1.4 | 0.3 | 0.2 |
| M1.6 | 0.35 | 0.2 |
| M1.8 | 0.35 | 0.2 |
| M2 | 0.4 | 0.25 |
| M2.2 | 0.45 | 0.25 |
| M2.5 | 0.45 | 0.35 |
| M3 | 0.5 | 0.35 |
| M3.5 | 0.6 | 0.35 |
| M4 | 0.7 | 0.5 |
| M4.5 | 0.75 | 0.5 |
| M5 | 0.8 | 0.5 |
| M5.5 | - | 0.5 |
| M6 | 1 | 0.75 |
| M7 | 1 | 0.75 |
| M8 | 1.25 | 1 |
| M9 | 1.25 | 1 |
| M10 | 1.5 | 1.25 |
| M11 | 1.5 | 1 |
| M12 | 1.75 | 1.25 |
| M14 | 2 | 1.5 |
| M15 | - | 1.5 |
| M16 | 2 | 1.5 |
| M17 | - | 1.5 |
| M18 | 2.5 | 1.5 |
| M20 | 2.5 | 2 |
| M22 | 2.5 | 2 |
| M24 | 3 | 2 |
| M25 | - | 2 |
| M26 | - | 1.5 |
| M27 | 3 | 2 |
| M28 | - | 2 |
| M30 | 3.5 | 2 |
| M32 | - | 2 |
| M33 | 3.5 | 2 |
| M35 | - | 1.5 |
| M36 | 4 | 3 |
| M38 | - | 1.5 |
| M39 | 4 | 3 |
| M40 | - | 3 |
| M42 | 4.5 | 4 |
| M45 | 4.5 | 4 |
| M48 | 5 | 4 |
| M50 | - | 3 |
| M52 | 5 | 4 |
| M55 | - | 4 |
| M56 | 5.5 | 4 |
| M58 | - | 4 |
| M60 | 5.5 | 4 |
| M62 | - | 4 |
| M64 | 6 | 4 |
| M65 | - | 4 |
| M68 | 6 | 4 |
| M70 | 6 | 4 |
| M72 | 6 | 4 |
| M75 | - | 4 |
| M76 | 6 | 4 |
| M78 | - | 2 |
| M80 | 6 | 4 |
| M82 | - | 2 |
| M85 | 6 | 4 |
| M90 | 6 | 4 |