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M/M MACHINE SCREW Coarse Thread 2A (60°)

Size	Pitch	Major Diameter (D) 6g		Rolling Diameter (d) 6g		Recommended Machine
Size	Pitch	Max	Min	Max	Min	Ls	Lm
M2	0.40	1.98	1.89	1.70	1.67	51	64
M2.3	0.40	2.28	2.19	2.00	1.97	51	64
M2.6	0.45	2.58	2.48	2.26	2.23	51	64
M3	0.50	2.98	2.87	2.63	2.60	51	64
M3.5	0.60	3.47	3.36	3.06	3.03	51	64
M4	0.70	3.97	3.83	3.49	3.45	51	64
M4.5	0.75	4.47	4.34	3.96	3.92	76	89
M5	0.80	4.97	4.82	4.43	4.38	76	89
M6	1.00	5.97	5.82	5.30	5.25	90	105
M8	1.25	7.96	7.79	7.12	7.07	108	127
M10	1.50	9.96	9.77	8.97	8.91	150	165
M11	1.50	10.96	10.73	9.97	9.91	150	165
M12	1.75	11.95	11.76	10.79	10.73	190	215
M14	2.00	13.95	13.74	12.63	12.56	190	215
M16	2.00	15.95	15.74	14.63	14.56	230	265
M18	2.50	17.95	17.71	16.31	16.23	280/290	310/330
M20	2.50	19.95	19.71	18.31	18.23	280/290	310/330
M22	2.50	21.95	21.71	20.31	20.23	380	420
M24	3.00	23.94	23.68	21.98	21.90	380	420
M27	3.00	26.94	26.68	24.98	24.89	400	450
M30	3.50	29.94	29.66	27.66	27.56	500	550
M33	3.50	32.94	32.66	30.65	30.56	500	550

M/M MACHINE SCREW Fine Thread 2A (60°)

Size	Pitch	Major Diameter (D) 6g		Rolling Diameter (d) 6g		Recommended Machine
Size	Pitch	Max	Min	Max	Min	Ls	Lm
M4	0.50	3.98	3.87	3.61	3.57	51	64
M4.5	0.50	4.48	4.37	4.11	4.07	76	89
M5	0.50	4.98	4.87	4.61	4.57	76	89
M6	0.75	5.98	5.84	5.45	5.41	90	105
M7	0.75	6.98	6.84	6.45	6.41	100	115
M8	1.00	7.97	7.79	7.29	7.24	108	127
M9	1.00	8.97	8.70	8.29	8.24	127	140
M10	1.00	9.97	9.79	9.28	9.23	150	165
M10	1.25	9.97	9.76	9.12	9.07	150	165
M12	1.25	11.97	11.76	11.12	11.06	190	215
M12	1.50	11.97	11.73	10.95	10.89	190	215
M14	1.50	13.97	13.73	12.95	12.89	190	215
M16	1.50	15.97	15.73	14.95	14.89	230	265
M18	1.50	17.97	17.73	16.93	16.86	280/290	310/330
M18	2.00	17.96	17.68	16.62	16.54	280/290	310/330
M20	1.50	19.97	19.73	18.92	18.85	280/290	310/330
M20	2.00	19.69	19.68	18.62	18.54	280/290	310/330
M22	1.50	21.97	21.73	20.92	20.85	380	420
M24	1.50	23.97	23.73	22.92	22.85	380	420
M26	1.50	25.97	25.73	24.93	24.85	380	420
M28	1.50	27.97	27.73	26.93	26.85	400	450
M30	1.50	29.97	29.73	28.93	28.85	500	550

UNC MACHINE SCREW UNC 2A (60°)

Size	TPI	Major Diameter (D) 2A		Rolling Diameter (d) 2A		Recommended Machine
Size	TPI	Max	Min	Max	Min	Ls	Lm
#1	64	1.838	1.743	1.57	1.54	51	64
#2	56	2.169	2.066	1.86	1.84	51	64
#3	48	2.496	2.383	2.14	2.11	51	64
#4	40	2.824	2.695	2.40	2.36	51	64
#5	40	3.154	3.026	2.72	2.69	51	64
#6	32	3.484	3.333	2.95	2.91	51	64
#8	32	4.142	3.991	3.60	3.57	76	89
#10	24	4.800	4.618	4.09	4.05	76	89
#12	24	5.461	5.279	4.75	4.70	76	89
1/4	20	6.322	6.117	5.50	5.45	90	105
5/16	18	7.907	7.687	6.98	6.93	108	127
3/8	16	9.491	9.254	8.45	8.40	127	140
7/16	14	11.076	10.816	9.89	9.83	150	165
1/2	13	12.661	12.386	11.39	11.32	190	215
9/16	12	14.246	13.958	12.87	12.80	190	215
5/8	11	15.834	15.528	14.33	14.26	230	265
3/4	10	19.004	18.677	17.34	17.27	230	265
7/8	9	22.176	21.824	20.34	20.26	280/290	310/330
1"	8	25.349	24.969	23.28	23.20	380	420
1"1/8	7	28.591	28.103	26.16	26.07	400	450
1"1/4	7	31.694	31.278	29.33	29.24	500	550
1"3/8	7	34.864	24.002	32.12	32.02	500	550

UNF MACHINE SCREW UNC 2A (60°)

Size	TPI	Major Diameter (D) 2A		Rolling Diameter (d) 2A		Recommended Machine
Size	TPI	Max	Min	Max	Min	Ls	Lm
#2	64	2.169	2.073	1.90	1.87	51	64
#3	56	2.496	2.393	2.19	2.16	51	64
#4	48	2.827	2.713	2.46	2.43	51	64
#5	44	3.157	3.036	2.76	2.73	51	64
#6	40	3.484	3.356	3.05	3.02	51	64
#8	36	4.145	4.006	3.66	3.63	51	64
#10	32	4.803	4.651	4.26	4.22	76	89
#12	28	5.461	5.296	4.84	4.80	76	89
1/4	28	6.324	6.160	5.72	5.68	90	105
5/16	24	7.909	7.727	7.20	7.16	108	127
3/8	24	9.497	9.315	8.76	8.74	127	140
7/16	20	11.079	10.874	10.23	10.18	150	165
1/2	20	12.666	12.462	11.82	11.76	190	215
9/16	18	14.251	14.031	13.31	13.25	190	215
5/8	18	15.839	15.619	14.89	14.83	230	265
3/4	16	19.011	18.774	17.95	17.89	230	265
7/8	14	22.184	21.923	20.98	20.91	280/290	280/290
1"	12	25.254	25.065	23.95	23.87	400	450
1"1/8	12	28.529	28.240	27.12	27.05	400	450
1"1/4	7	31.704	31.415	30.29	30.21	500	550
1"3/8	12	34.876	34.588	33.46	33.38	500	550
1"1/2	12	38.051	37.763	36.63	36.55	500	550

British Standard Thread – BSW (55°, 2A)

Size	TPI	Major Diameter (D) 2A		Rolling Diameter (d) Medium Class		Recommended Machine
Size	TPI	Max	Min	Max	Min	Ls	Lm
W1/16	60	1.56	1.47	1.29	1.27	51	64
W3/32	48	2.36	2.15	2.01	1.99	51	64
W1/8	40	3.15	3.04	2.72	2.70	51	64
W5/32	32	3.94	3.79	3.40	3.38	51	64
W3/16	24	4.74	4.59	4.06	4.02	76	89
W1/4	20	6.33	6.16	5.49	5.42	90	105
W5/16	18	7.91	7.72	6.99	6.91	108	127
W3/8	16	9.50	9.31	8.46	8.37	127	140
W7/16	14	11.08	10.89	9.90	9.81	150	165
W1/2	12	12.67	12.46	11.29	11.19	190	215
W9/16	12	14.25	14.04	12.87	12.77	190	215
W5/8	11	15.84	15.60	14.34	14.24	230	265
W3/4	10	19.02	18.78	17.36	17.25	230	265
W7/8	9	22.19	21.93	20.34	20.23	280	310
W1"	8	25.37	25.11	23.29	23.17	380	420

Above are the standard rolling diameter, it may differ due to specific requirement
If there have special requirement, please inform us. (Ex. specific radius of rounded roof or strength requirement)
Blank will greatly affect the lifetime of rolling die and screw quality, please let us know the size of blank before order

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