thread d , in mm	dimension b , in mm	head diameter d_k , in mm	dimension k , in mm	dimension n , in mm	dimension r_1 max., in mm	dimension r_1 min., in mm	dimension t min., in mm	dimension t max., in mm	Range of commercial lengths l nom., in mm
M3	19	6	1.8	0.8	1.2	0.6	0.7	0.95	3, 4, 5, 6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30
(M3.5)	20	7	2.1	0.8	1.4	0.7	0.8	1.1	4, 5, 6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35
M4	22	8	2.4	1	1.6	0.8	1	1.3	5, 6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40
M5	25	10	3	1.2	2	1	1.2	1.5	6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50
M6	28	12	3.6	1.6	2.4	1.2	1.5	1.9	8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50
(M8)	34	16	4.8	2	3.2	1.6	1.9	2.4	10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50, 55
(M10)	40	20	6	2.5	4	2	2.4	3	12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50, 55, 60