ASME B18.31.1M Metric Continous Thread Studs Dimensions Standards

ASME B18.31.1M Metric Continuous Thread Studs standard covers the complete dimensional and general data for continuous thread metric series studs recognized as an American National Standard. The following configuration is covered: Continuous thread stud: studs that are threaded over their complete length.

The inclusion of dimensional data in ASME B18.31.1M standard is not intended to imply that all products described are stock production items. Consumers should consult with suppliers concerning availability of products.
The Tables measurements are also converted into millimeters to make the information clearer and easier to understand.

ASME B18.31.1M Metric Continous Thread Studs Dimensions (mm)

Nominal Size Diameter, D	Pitch, P	Umax = 2P	Nominal Length, LT
			Range	Increments
M5	0.8	1.6	12 - 20	4
			25 - 50	5
			60 - 160	10
			≥ 180	20
M6	1	2.0	16 - 20	4
			25 - 50	5
			60 - 160	10
			≥ 180	20
M8	1.25	2.5	25 - 50	5
			60 - 160	10
			≥ 180	20
M10	1.5	3.0	30 - 50	5
			60 - 160	10
			> 180	20
M12	1.75	3.5	40 - 50	5
			60 - 160	10
			≥ 180	20
M14	2	4.0	60 - 160	10
			≥ 180	20
M16	2	4.0	60 - 160	10
			≥ 180	20
M20	2.5	5.0	60 - 160	10
			≥ 180	20
M22	2.5	5.0	60 - 160	10
			≥ 180	20
M24	3	6.0	70 - 160	10
			≥ 180	20
M27	3	6.0	80 - 160	10
			≥ 180	20
M30	3.5	7.0	90 - 160	10
			≥ 180	20
M36	4	8.0	110 - 160	10
			≥ 180	20
M42	4.5	9.0	120 - 160	10
			≥ 180	20
M48	5	10.0	150 - 160	10
			≥ 180	20
M56	5.5	11.0	≥ 180	20
M64	6	12.0	≥ 180	20
M72	6	12	≥ 200	20
M80	6	12	≥ 200	20
M90	6	12	≥ 200	20
M100	6	12	≥ 200	20

ASME B18.31.1M Metric Continous Thread Studs Length Tolerance (mm)

Nominal Length		Tolerance
Over	Through
6	10	± 0.45
10	18	± 0.55
18	30	± 0.65
30	50	± 0.80
50	80	± 1.50
80	120	± 1.75
120	180	± 2.00
180	250	± 2.30
250	315	± 2.60
315	400	± 2.85
400	500	± 3.15
>500	...	± 10.00