Product

Screw/Worm Wheel
Product name： (1)4 threads Screw　 ...
Pipe Pattern/Rolling Pattern
Product name Straight knurling screw thread, Rolling cross pattern. ...
Thread Angle/Thread Rolling
Product name Thread angle set for scaffold Material for ...
CNC computer numerical control lathe
YCL model specification table : Specification YCL-32 Max. turning ...

Reference table for the diameters of material used

下載英.png

Screw thread in metric system (單位:mm)

Distinction	Name	Diametric pitch	等級Class
Distinction	Name	Diametric pitch	Class 1	Class 2	Class 3
Coarseness of the thread	M3	0.5	2.66-2.64	2.63-2.60	-
	3.5	0.6	3.10-3.08	3.06-3.03	3.05-3.00
	4	0.7	3.54-3.51	3.49-3.45	-
	4.5	0.75	4.01-3.98	3.96-3.92	3.94-3.88
	5	0.8	4.47-4.44	4.43-4.38	4.40-4.33
	6	1	5.34-5.31	5.30-5.25	5.28-5.21
	7	1	6.34-6.31	6.30-6.25	6.28-6.21
	8	1.25	7.18-7.14	7.12-7.07	7.10-7.03
	9	1.25	8.18-8.14	8.12-8.07	8.10-8.03
	10	1.5	9.03-8.99	8.97-8.91	8.94-8.86
	11	1.5	10.02-9.98	9.97-9.91	9.94-8.86
	12	1.75	10.86-10.82	10.79-10.73	10.77-10.69
	14	2	12.70-12.65	12.63-12.56	12.61-12.52
	16	2	14.70-14.65	14.63-14.56	14.61-14.52
	18	2.5	16.38-16.33	16.31-16.23	16.28-16.17
	20	2.5	18.38-18.33	18.31-18.23	18.28-18.17
	22	2.5	20.38-20.33	20.31-20.23	20.28-20.17
	24	3	22.07-22.01	21.98-21.90	21.96-21.85
	27	3	25.06-25.00	24.98-24.89	24.95-24.84
	30	3.5	27.75-27.68	27.66-27.56	27.63-27.50
	33	3.5	30.74-30.68	30.65-30.56	30.62-30.50
	36	4	33.43-33.37	33.33-33.23	33.29-33.16
	39	4	36.43-36.36	36.32-36.22	36.27-36.11
	42	4.5	39.11-39.04	39.01-38.90	38.97-38.82
	45	4.5	42.11-42.04	42.00-41.90	41.96-41.82
	48	5	44.75-44.60	44.68-44.45	44.68-44.37

Screw thread in metric system (單位:mm)

Distinction	External diameter	Thread pitch	Class 1	Class 2	Class 3
Dainty of the thread	4	0.5	3.65-3.63	3.61-3.56	3.60-3.54
	4.5	0.5	4.15-4.13	4.11-4.06	4.10-4.04
	5	0.5	4.64-4.63	4.61-4.56	4.60-4.545
	5.5	0.5	5.15-5.13	5.11-5.06	5.10-5.04
	6	0.75	5.49-5.46	5.45-5.40	5.43-5.37
	7	0.75	6.49-6.46	6.45-6.40	6.43-6.37
	8	0.75	7.49-7.45	7.44-7.39	7.42-7.36
	8	1	7.33-6.46	7.28-7.23	7.26-7.19
	9	1	8.33-8.29	8.28-8.23	8.26-8.19
	10	1	9.33-9.29	9.29-9.22	9.26-9.19
	10	1.25	9.17-9.13	9.11-9.06	9.09-9.02
	11	1.25	10.61-10.12	10.11-10.05	10.09-10.01
	12	1.25	11.15-11.13	11.12-11.07	11.08-10.98
	12	1.5	11.00-10.96	10.94-10.88	10.92-10.84
	13	1.5	12.00-11.96	11.94-11.88	11.92-11.84
	14	1.5	13.00-12.96	12.94-12.87	12.92-12.83
	15	1.5	14.00-13.95	13.94-14.87	13.92-13.83
	16	1.5	15.00-14.95	14.97-14.87	14.92-14.83

UNC US version of coarse screw thread (單位:mm)

Name		Class
Name		3A	2A	1A
No 6	32	2.98-2.95	2.95-2.91	-
No 8	32	3.64-3.61	3.60-3.57	-
No 10	24	4.12-4.09	4.09-4.05	-
No 12	24	4.78-4.75	4.75-4.70	-
1/4	20	5.53-5.50	5.50-5.45	5.47-5.40
5/16	18	7.03-6.99	6.98-6.93	6.96-6.88
3/8	16	8.50-8.46	8.45-8.40	8.43-8.34
7/16	14	9.94-9.90	9.89-9.83	9.86-9.77
1/2	13	11.44-11.39	11.39-11.32	11.35-11.26
9/16	12	12.92-12.87	12.87-12.80	12.83-12.73
5/8	11	14.39-14.34	14.33-14.26	14.30-14.19
3/4	10	17.41-17.35	17.34-17.27	17.31-17.20
7/8	9	20.40-20.34	20.34-20.26	20.30-20.17
1	8	23.35-23.33	23.28-23.20	23.24-23.11
11/8	7	26.24-26.17	26.16-26.07	26.12-25.98
11/4	7	29.41-29.34	29.33-29.24	29.28-29.14
13/8	6	32.20-32.13	32.12-32.02	32.07-31.91
11/2	6	35.53-35.20	35.29-35.08	35.29-34.98
13/4	5	41.15-40.98	41.08-40.85	41.08-40.74
2	4 1/2	47.13-46.95	47.06-46.82	47.16-47.00

UNC US version of dainty screw thread (單位:mm)

Name		Class
Name		3A	2A	1A
U No 6	40	3.08-3.06	3.05-3.02	-
No 8	36	3.69-3.67	3.66-3.63	-
No 10	32	4.29-4.26	4.26-4.22	-
No 12	28	4.88-4.85	4.84-4.80	-
1/4	28	5.75-5.72	5.72-5.68	5.70-5.63
5/16	24	7.24-7.21	7.20-7.16	7.18-7.11
3/8	24	8.83-8.79	8.79-8.74	8.76-8.69
7/16	20	10.28-10.24	10.23-10.18	10.21-10.13
1/2	20	11.86-11.82	11.82-11.76	11.79-11.71
9/16	18	13.36-13.32	13.31-13.25	13.28-13.19
5/8	18	14.94-14.90	14.89-14.83	14.86-14.77
3/4	16	18.00-17.96	17.95-17.89	17.92-17.82
7/8	14	21.03-20.98	20.98-20.91	20.94-20.84
1	12	24.01-23.96	23.95-23.87	23.91-23.80
11/8	12	27.19-27.13	27.12-27.05	27.08-26.97
11/4	12	30.36-30.30	30.29-30.21	30.25-30.14
13/8	12	33.53-33.47	33.46-33.38	33.42-30.30
11/2	12	36.70-36.64	36.63-36.55	36.59-36.47

Screw thread in British system

Class	Class 2	Class 3	Class 4
W 3/16-24	4.08-4.05	4.06-4.02	4.04-3.97
1/4-20	5.51-5.46	5.49-5.42	5.47-5.38
5/16-18	7.01-6.95	6.99-6.91	6.97-6.87
3/8-16	8.48-8.41	8.46-8.37	8.44-8.33
7/16-14	9.92-9.85	9.90-9.81	9.87-9.76
1/2-12	11.31-11.24	11.29-11.19	11.27-11.15
9/16-12	12.89-12.82	12.87-12.77	12.85-12.73
5/8-11	14.36-14.29	14.34-14.24	14.31-14.18
3/4-10	17.38-17.30	17.36-17.25	17.33-17.19
7/8-9	20.38-20.29	20.34-20.23	20.32-20.18
1-8	23.32-23.23	23.29-23.17	23.26-23.11

Screw used in stitching machinery

Name	number of thread	Class 1	Class 2	Class 3
SM 1/8	40	2.748-2.718	2.735-2.688	2.713-2.648
1/8	44	2.782-2.752	2.769-2.722	2.747-2.682
9/64	40	3.143-3.113	3.128-3.083	3.108-3.043
11/64	40	3.785-3.845	3.855-3.805	3.840-3.775
3/16	32	4.220-4.185	4.205-4.155	4.190-4.125
3/16	28	4.158-4.983	4.143-4.093	4.128-4.063
7/32	32	5.018-4.983	5.003-4.955	4.983-4.913
15/64	28	5.345-5.310	5.325-5.570	5.310-5.240
1/4	40	5.910-5.875	5.890-5.735	5.870-5.795
1/4	28	5.736-5.696	5.721-5.366	5.701-5.626
9/32	28	6.508-6.448	6.508-6.648	6.493-6.418
11/32	28	8.121-8.702	8.902-8.432	8.072-7.992
3/8	28	8.905-8.865	8.880-8.015	8.865-8.785
7/16	28	10.486-10.401	10.466-10.401	10.441-10.350
7/16	16	10.062-10.017	10.819-11.749	10.012-9.917
1/2	20	11.844-11.799	11.819-11.749	11.794-11.699
9/16	20	13.425-13.375	13.400-13.425	13.380-13.285

Screw thread in pipe application

Name	PF		PS	PT
Name	Class A	Class B	PS	Position for baseline diameter	Diameter for material used
1/8-28	9.10-9.05	9.05-8.94	9.00-8.92	9.00-8.92	9.16-9.10
1/4-19	12.25-12.19	12.19-12.07	12.11-12.01	12.11-12.01	12.32-12.23
3/8-19	15.76-15.69	15.69-15.57	15.61-15.51	15.61-15.51	15.82-15.73
1/2-14	19.74-19.67	19.67-19.53	19.55-19.43	19.55-19.43	19.81-19.70
3/4-14	25.22-25.12	25.15-25.01	25.03-24.90	25.03-24.90	25.29-25.18
1-11	21.7-31.61	31.61-31.43	31.47-31.34	31.47-31.34	31.79-31.64

^
TOP