BS 4395 Nobe Washer (M Mark)

Washer Dimensions in mm
Dimensions of 300HV Steel Washers with inner chamfer
Nominal Size d	Inside Dia. B		Outside Dia. C		Thickness A
	Max	Min	Max	Min	Max	Min
M12	13.8	13.4	30	29	2.8	2.4
M16	17.8	17.4	37	36	3.4	3.0
M20	21.5	21.1	44	43	3.7	3.3
M22	23.4	23.0	50	48.5	4.2	3.8
M24	26.4	26.0	56	54.5	4.2	3.8
M27	29.4	29.0	60	58.5	4.2	3.8
M30	32.8	32.4	66	64.5	4.2	3.8
M36	38.8	38.4	85	83.5	4.6	4.2