Diameter	Coarse Pitch	Fine Thread Pitches
M1	0.25	0.20
M1.2	0.25	0.20
M1.4	0.30	0.20
M1.6	0.35	0.20
M1.7	0.35
M1.8	0.35	0.20
M2	0.40	0.25
M2.2	0.45	0.25
M2.3	0.40
M2.5	0.45	0.35
M2.6	0.45
M3	0.50	0.35
M3.5	0.60	0.35
M4	0.70	0.5
M5	0.80	0.50
M6	1.00	0.75
M7	1.00	0.75
M8	1.25	1.00	0.75
M9	1.25	1.00	0.75
M10	1.50	1.25	1.00	0.75
M11	1.50	1.00	0.75
M12	1.75	1.50	1.25	1.00
M14	2.00	1.50	1.25	1.00
M16	2.00	1.50	1.00
M18	2.50	2.00	1.50	1.00
M20	2.50	2.00	1.50	1.00
M22	2.50	2.00	1.50	1.00
M24	3.00	2.00	1.50	1.00
M27	3.00	2.00	1.50	1.00
M30	3.50	3.00	2.00	1.50
M33	3.50	3.00	2.00	1.50
M36	4.00	3.00	2.00	1.50
M39	4.00	3.00	2.00	1.50
M42	4.50	4.00	3.00	2.00
M45	4.50	4.00	3.00	2.00
M48	5.00	4.00	3.00	2.00
M52	5.00	4.00	3.00	2.00
M56	5.50	4.00	3.00	2.00
M60	5.50	4.00	3.00	2.00
M64	6.00	4.00	3.00	2.00
M68	6.00	4.00	3.00	2.00
M72	6.00	4.00	3.00	2.00
M80	6.00	4.00	3.00	2.00
M90	6.00	4.00	3.00	2.00
M100	6.00	4.00	3.00	2.00

UNC- Unified National Coarse Thread Pitch according to ANSI B1.1

Major Diameter	Threads Per inch	Major Dia	Major Dia	Tap Drill Size	Pitch
(in)		(in)	(mm)	(mm)	(mm)
#1 - 64	64	0.073	1.854	1.5	0.397
#2 - 56	56	0.086	2.184	1.8	0.453
#3 - 48	48	0.099	2.515	2.1	0.529
#4 - 40	40	0.112	2.845	2.35	0.635
#5 - 40	40	0.125	3.175	2.65	0.635
#6 - 32	32	0.138	3.505	2.85	0.794
#8 - 32	32	0.164	4.166	3.5	0.794
#10 - 24	24	0.19	4.826	4	1.058
#12 - 24	24	0.216	5.486	4.65	1.058
1/4" - 20	20	0.25	6.35	5.35	1.27
5/16" - 18	18	0.313	7.938	6.8	1.411
3/8" - 16	16	0.375	9.525	8.25	1.587
7/16" - 14	14	0.438	11.112	9.65	1.814
1/2" - 13	13	0.5	12.7	11.15	1.954
9/16" - 12	12	0.563	14.288	12.6	2.117
5/8" - 11	11	0.625	15.875	14.05	2.309
3/4" - 10	10	0.75	19.05	17	2.54
7/8" - 9	9	0.875	22.225	20	2.822
1" - 8	8	1	25.4	22.85	3.175
1 1/8" - 7	7	1.125	28.575	25.65	3.628
1 1/4" - 7	7	1.25	31.75	28.85	3.628
1 3/8" - 6	6	1.375	43.925	31.55	4.233
1 1/2" - 6	6	1.5	38.1	34.7	4.233
1 3/4" - 5	5	1.75	44.45	40.4	5.08
2" - 4 1/2	4 1/2	2	50.8	46.3	5.644
2 1/4" - 4 1/2	4 1/2	2.25	57.15	52.65	5.644
2 1/2" - 4	4	2.5	63.5	58.5	6.35
2 3/4" - 4	4	2.75	69.85	64.75	6.35
3" - 4	4	3	76.2	71.1	6.35
3 1/4" - 4	4	3.25	82.55	77.45	6.35
3 1/2" - 4	4	3.5	88.9	83.8	6.35
3 3/4" - 4	4	3.75	95.25	90.15	6.35
4" - 4	4	4	101.6	96.5	6.35

UNF- Unified National Fine Thread Pitch according to ANSI B1.1

Major Diameter	Threads Per inch	Major Dia	Major Dia	Tap Drill Size	Pitch
(in)		(in)	(mm)	(mm)	(mm)
#0 - 80	80	0.06	1.524	1.25	0.317
#1 - 72	72	0.073	1.854	1.55	0.353
#2 - 64	64	0.086	2.184	1.9	0.397
#3 - 56	56	0.099	2.515	2.15	0.453
#4 - 48	48	0.112	2.845	2.4	0.529
#5 - 44	44	0.125	3.175	2.7	0.577
#6 - 40	40	0.138	3.505	2.95	0.635
#8 - 36	36	0.164	4.166	3.5	0.705
#10 - 32	32	0.19	4.826	4.1	0.794
#12 - 28	28	0.216	5.486	4.7	0.907
1/4" - 28	28	0.25	6.35	5.5	0.907
5/16" - 24	24	0.313	7.938	6.9	1.058
3/8" - 24	24	0.375	9.525	8.5	1.058
7/16" - 20	20	0.438	11.112	9.9	1.27
1/2" - 20	20	0.5	12.7	11.5	1.27
9/16" - 18	18	0.563	14.288	12.9	1.411
5/8" - 18	18	0.625	15.875	14.5	1.411
3/4" - 16	16	0.75	19.05	17.5	1.587
7/8" - 14	14	0.875	22.225	20.4	1.814
1" - 12	12	1	25.4	23.25	2.117
1 1/8" - 12	12	1.125	28.575	26.5	2.117
1 1/4" - 12	12	1.25	31.75	29.5	2.117
1 3/8" - 12	12	1.375	34.925	32.75	2.117
1 1/2" - 12	12	1.5	38.1	36	2.117