Fastener Sizes

16 diameter sizes, each with its own page listing every standard that covers it.

Metric diameters

coarse pitch series

Size	Major Ø (mm)	Coarse pitch (mm)	Tap drill (mm)
M10	10	1.5	8.5
M12	12	1.75	10.25
M14	14	2	12
M16	16	2	14
M18	18	2.5	15.5
M2	2	0.4	1.6
M2.5	2.5	0.45	2.05
M20	20	2.5	17.5
M22	22	2.5	19.5
M24	24	3	21
M3	3	0.5	2.5
M3.5	3.5	0.6	2.9
M4	4	0.7	3.3
M5	5	0.8	4.2
M6	6	1	5
M8	8	1.25	6.75