Metric Tap and Clearance Holes

Screw Size	Thread Pitch (MM)	Plastic Taping Drill Size mm – SAE	Steel Taping Drill Size mm – SAE	Clearance Drill Bit Close Fit mm – SAE	Clearance Drill Bit Standard Fit mm – SAE
M2	0.45	1.55 – 1/16	1.7 – 51	2.1 – 45	2.2 – 44
M2.5	0.45	2.05 – 46	2.2 – 44	2.65 – 37	2.75 – 7/64
M3	0.5	2.5 – 39	2.7 – 36	3.15 – 1/8	3.3 – 30
M4	0.7	3.3 – 30	3.5 – 28	4.2 – 19	4.4 – 17
M5	0.8	4.2 – 19	4.5 – 16	5.25 – 5	5.5 – 7/32
M6	1	5 -8	5.4 – 4	6.3 – E	6.6 – G
M8	1.25	6.8 – H	7.2 – J	8.4 – Q	8.8 – S
M10	1.5	8.5 – R	9 – T	10.5 – Z	11 – 7/16
M12	1.75	10.3 – 13/32	10.9 – 27/64	12.6 – 1/2	13.2 – 33/64
M14	2	12.1 – 15/32	12.7 – 1/2	14.75 – 37/64	15.5 – 39/64
M16	2	14 – 35/64	14.75 – 37/64	16.75 – 21/32	17.5 – 11/16
M18	2.5	15.5 – 39/64	16.5 – 41/64	19 – 3/4	20 – 35/32