Question #6908   Submitted by Answiki on 10/14/2022 at 07:41:07 AM UTC

What diameter should I pre-drill for an M2 tap?

Answer   Submitted by Answiki on 10/14/2022 at 07:41:53 AM UTC

The pre-drilled diameter of an M2 x 0.4 thread is 1.6 mm.


The pre-drilled diameter for tapping is given by the drilling diameter minus the pitch. For a standard M2 x 0.4 tap, you need to drill to 2 - 0.4 = 1.6 mm.

2 events in history
Answer by Answiki on 10/14/2022 at 07:41:53 AM

The pre-drilled diameter of an M2 x 0.4 thread is 1.6 mm.


The pre-drilled diameter for tapping is given by the drilling diameter minus the pitch. For a standard M2 x 0.4 tap, you need to drill to 2 - 0.4 = 1.6 mm.

Question by Answiki 10/14/2022 at 07:41:07 AM
What diameter should I pre-drill for an M2 tap?
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