Boring head bolts with cut

The thread, which sits bolt with a cut head, if possible should not be damaged, as follows:

- Zakernite center bolt residue;

- Now you can start drilling. To the size of the M8 bolts can be drilled for the drill holes for the threads (the diameter of the bolt body without cutting). For bolts up to M6 operates a rule of thumb: the thread diameter is multiplied by 0.8. For example, a threaded connection M6 x 0.8 = diameter of the threaded holes = 4.8 mm. Bolts sizes from M8 to be pre-drilled thinner drill;

- Remaining in the thread, metal particles are removed prescriber. However, in most cases, you need to re-threaded.