BS 4168 Socket Head Cap Screws

Dimensions of Socket Head Cap Screws

d	Max D	Max H	S (key size)	t min
M3	5.5	3	2.5	1.3
M4	7	4	3	2
M5	8.5	5	4	2.5
M6	10	6	5	3
M8	13	8	6	4
M10	16	10	8	5
M12	18	12	10	6
M14	21	14	12	7
M16	24	16	14	8
M18	27	18	14	9
M20	30	20	17	10
M22	33	22	17	11
M24	36	24	19	12
M27	40	27	19	13.5
M30	45	30	22	15.5
M36	54	36	27	19
M42	63	42	32	24