Metric
Taps				Dies
Thread	Pitch mm			Thread	Pitch mm
3	0.5			3	0.5
3.5	0.6			3.5	0.6
4	0.7			4	0.7
5	0.8			5	0.8
6	1			6	1
7	1			7	1
8	1.25			8	1.25
9	1.25			9	1.25
10	1.5			10	1.5
11	1.5			11	1.5
12	1.75			12	1.75
14	2			14	2
16	2			16	2
18	2.5			18	2.5
20	2.5			20	2.5
22	2.5			22	2.5
24	3			24	3
	Model Engineers
Taps				Dies
Thread	Pitch tpi			Thread	Pitch tpi
1/8	40			1/8	40
5/32	40			5/32	40
3/16	40			3/16	40
7/32	40			7/32	40
1/4	40			1/4	40
9/32	40			9/32	40
5/16	40			5/16	40
3/8	40			3/8	40
7/16	40			7/16	40
1/2	40			1/2	40