I am doing quite a bit of maintenance at the moment (more on that in future posts).
I had to replace a couple of bolts that were badly damaged but didn’t know the size. All I had was the spanner/socket size. Here is a list of spanner/socket size vs bolt size which came in very handy.
| Bolt Size | Socket/Spanner Size |
| M3 | 5.5mm |
| M4 | 7mm |
| M5 | 8mm |
| M6 | 10mm |
| M7 | 11mm |
| M8 | 13mm |
| M10 | 17mm |
| M12 | 19mm |
| M14 | 22mm |
| M16 | 24mm |
| M18 | 27mm |
| M20 | 30mm |
| M22 | 32mm |
| M24 | 36mm |