M4 Tap Drill Size

Use a 3.3 mm drill for a M4 x 0.7 tap — .1299" (3.30 mm).

Rule of thumb for metric: drill = major diameter - pitch. For M4 that lands on 3.3 mm.

Nearby taps

Tap	Drill	Decimal
M3 x 0.5	2.5	.0984
M5 x 0.8	4.2	.1654

Printable PDF version - Tap Drill Chart
Clean letter-size sheet for the toolbox or shop wall. Instant download, $3.49.