Screw Size Chart
Reference chart for common metric and imperial screw thread equivalents.
| Metric size | Closest imperial size |
|---|---|
| M2 | #2-56 |
| M3 | #4-40 |
| M4 | #8-32 |
| M5 | #10-24 |
| M6 | 1/4-20 |
| M8 | 5/16-18 |
| M10 | 3/8-16 |
| M12 | 1/2-13 |
See full specifications for M6 bolts. 1/4-20 bolt size. All bolt and screw sizes.