Threads per Inch

10
10 TPI
11
11 1/2
11 TPI
11.5
11.5 TPI
12
12 TPI
13
13 TPI
14
14 TPI
15
16
16 TPI
18
18 TPI
19
20
20 TPI
22
24
24 TPI
27
27 TPI
28
28 TPI
32
32 TPI
36
4.5
40
40 TPI
44
48
48 TPI
5
56
56 TPI
6
64
7
72
8
8 TPI
80
9
Fully Threaded
Partially Threaded