Quote:
| Originally Posted by Spjallen Thanks guys. As Ive never done this before if I want to tap a M8 size thread what size plain hole do I drill first? Can be as simple as an 8mm? |
No, for std thread metric fasteners its bolt size minus pitch. so your plain hole will be 6.8mm as a 6.75mm drill bit is not readily available. Or if you only have imperial sizes use a 17/64" drill bit.