Metric Thread Dimensions for ISO Standard Screws & Bolts - Engineersfield

Metric Thread Dimensions for ISO Standard Screws & Bolts

Metric Thread Dimensions for ISO Standard Screws & Bolts

Thread Size	Major Diameter (mm)	Minor Diameter (mm)	Thread Pitch (mm)	Pitch Diameter (mm)	Tapping Drill Diameter (mm)	Clearance Hole Dia. (mm)
M1	1	0.729	0.25	0.838	0.75	1.3
M1.1	1.1	0.829	0.25	0.938	0.85	1.4
M1.2	1.2	0.929	0.25	1.038	0.95	1.5
M1.4	1.4	1.075	0.3	1.205	1.1	1.8
M1.6	1.6	1.221	0.35	1.373	1.25	2
M1.8	1.8	1.421	0.35	1.573	1.45	2.3
M2	2	1.567	0.4	1.74	1.6	2.6
M2.2	2.2	1.713	0.45	1.908	1.75	2.9
M2.5	2.5	2.013	0.45	2.208	2.05	3.1
M3	3	2.459	0.5	2.675	2.5	3.6
M3.5	3.5	2.85	0.6	3.11	2.9	4.2
M4	4	3.242	0.7	3.545	3.3	4.8
M4.5	4.5	3.688	0.75	4.013	3.8	5.3
M5	5	4.134	0.8	4.48	4.2	5.8
M6	6	4.917	1	5.35	5	7
M7	7	5.917	1	6.35	6	8
M8	8	6.647	1.25	7.188	6.8	10
M9	9	7.647	1.25	8.188	7.8	11
M10	10	8.376	1.5	9.026	8.5	12
M11	11	9.376	1.5	10.026	9.5	13.5
M12	12	10.106	1.75	10.863	10.2	15
M14	14	11.835	2	12.701	12	17
M16	16	13.835	2	14.701	14	19
M18	18	15.394	2.5	16.376	15.5	22
M20	20	17.294	2.5	18.376	17.5	24
M22	22	19.294	2.5	20.376	19.5	26
M24	24	20.752	3	22.051	21	28
M27	27	23.752	3	25.051	24	33
M30	30	26.211	3.5	27.727	26.5	35
M33	33	29.211	3.5	30.727	29.5	38
M36	36	31.67	4	33.402	32	41
M39	39	34.67	4	36.402	35	44
M42	42	37.129	4.5	39.077	37.5	47
M45	45	40.129	4.5	42.077	40.5	50
M48	48	42.857	5	44.752	43	53
M52	52	46.587	5	48.752	47	57
M56	56	50.046	5.5	52.428	50.5	61
M60	60	54.046	5.5	56.428	54.5	65
M64	64	57.505	6	60.103	58	69
M68	68	61.505	6	64.103	62	73

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