Deterco, Inc.
Quality Products & Services
For Your Measurement Needs
Thread Ring Gages
Size
Threads per Inch
UNC
UNF
UNEF
0 (.060)
80
1 (.073)
64
72
2 (.086)
56
64
3 (.099)
48
56
4 (.112)
40
48
5 (.125)
40
44
6 (.138)
32
40
8 (.164)
32
36
10 (.190)
24
32
12 (.216)
24
28
12 (.216)
32
1/4
20
28
1/4
32
5/16
18
24
5/16
32
3/8
16
24
3/8
32
7/16
14
20
7/16
28
1/2
13
20
1/2
28
9/16
12
18
9/16
24
5/8
11
18
5/8
24
11/16
24
3/4
10
16
3/4
20
13/16
20
7/8
9
14
7/8
20
15/16
20
1
8
12/14
1
20
1-1/16
12
18
1-1/8
7
12
1-1/8
18
1-3/16
12
18
1-1/4
7
12
1-1/4
18
1-5/16
12
18
1-3/8
6
12
1-3/8
18
1-7/16
12
18
1-1/2
6
12
1-1/2
18
Pitch Diameter Charts
Updated: 10/2008
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Tel: (713) 943-2721 e-mail:
sales@deterco.com