Continuous Thread Studs ISO

ASME B18.31.1 Dimensions for Continuous Thread Studs

All dimensions are in mm unless mentioned otherwise

Nominal Size inch	Diameter, D	Threads Per Inch			Umax = 2 Thread Pitches = 2P
Nominal Size inch	Diameter, D	UNC	UNF	8UN	UNC Threads	UNF Threads	8UN Threads
1/4	0.2500	20	28	-	0.100	0.071	-
5/16	0.3125	18	2424	-	0.111	0.083	-
3/8	0.3750	16	20	-	0.125	0.083	-
7/16	0.4375	14	20	-	0.143	0.100	-
1/2	0.5000	13	1816	-	0.154	0.100	-
9/16	0.5625	12	14	-	0.167	0.111	-
5/8	0.6250	11	12	-	0.182	0.111	-
3/4	0.7500	10	12	-	0.200	0.125	-
7/8	0.8750	9	12	-	0.222	0.143	-
1	1.0000	8	12	-	0.250	0.167	-
1 1/8	1.1250	7	12	8	0.286	0.167	0.250
1 1/4	1.2500	7	-	8	0.286	0.167	0.250
1 3/8	1.3750	6	-	8	0.333	0.167	0.250
1 1/2	1.5000	6	-	8	0.333	0.167	0.250
1 5/8	1.6250	-	-	8	-	-	0.250
1 3/4	1.7500	5	-	8	0.400	-	0.250
1 7/8	1.8750	-	-	8	-	-	0.250
2	2.0000	4 1/2	-	8	0.444	--	0.250
2 1/4	2.2500	4 1/2	-	8	0.444	-	0.250
2 1/2	2.5000	4	-	8	0.500	-	0.250
2 3/4	2.7500	4	-	8	0.500	-	0.250
3	3.0000	4	-	8	0.500	-	0.250
3 1/4	3.2500	4	-	8	0.500	-	0.250
3 1/2	3.5000	4	-	8	0.500	-	0.250
3 3/4	3.7500	4	-	8	0.500	-	0.250
4	4.0000	4	-	8	0.500	-	0.250

Continuous Thread Stud Metric

ASME B18.31.1M Dimensions for Continuous Thread Studs

All dimensions are in mm unless mentioned otherwise

Nominal Size		Umax = 2P	Nominal Length, LT
Diameter, D	Pitch, P		Range	Increments
M5	0.8	1.6	12-20	4
			25-50	5
			60-160	10
			≥ 180	20
M6	1	2	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	30-50	5
			60-160	10
			≥ 180	20
M12	1.75	3.5	40-50	5
			60-160	10
			≥ 180	5
M14	2	4	60-160	10
			≥ 180	20
M16	2	4	60-160	10
			≥ 180	20
M20	2.5	5	60-160	10
			≥ 180	20
M22	2.5	5	60-160	10
			≥ 180	20
M24	3	6	70-160	10
			≥ 180	20
M27	3	6	80-160	10
			≥ 180	20
M30	3.5	7	90-160	10
			≥ 180	20
M36	4	8	110-160	10
			≥ 180	20
M42	4.5	9	120-160	10
			≥ 180	20
M48	5	10	150-160	10
			≥ 180	20
M56	5.5	11	≥ 180	20
M64	6	12	≥ 180	20
M72,M80, M90 and M100	6	12	≥ 180	20