Samson Industrial LLC
Samson University

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Fasteners - Threads Per Inch

Size
Coarse UNC
Fine UNF
Basic Major Dia.
Size
Coarse UNC
Fine UNF
Basic Major Dia.
0
-
80
.0600
1
8
12, 14
1.000
1
64
72
.0730
1 1/8
7
12
1.125
2
56
64
.0860
1 1/4
7
12
1.250
3
48
56
.0990
1 3/8
6
12
1.375
4
40
48
.1120
1 1/2
6
12
1.508
5
40
44
.1250
1 5/8
5 1/2
-
1.625
6
32
40
.1380
1 3/4
5
12
1.750
8
32
36
.1640
1 7/8
5
-
1.875
10
24
32
1900
2
4 1/2
12
2.000
12
24
28
.2160
2 1/4
4 1/2
12
2.250
1/4
20
28
.2500
2 1/2
4
12
2.500
5/16
18
24
.3125
2 3/4
4
12
2.750
3/8
16
24
.3750
3
4
12
3.000
7/16
14
20
.4375
3 1/4
4
-
3.250
1/2
13
20
.5000
3 1/2
4
-
3.500
9/16
12
18
.5625
3 3/4
4
-
3.750
5/8
11
18
.6250
4
-
-
4.000
3/4
10
16
.7500
-
-
-
-
7/8
9
14
.8750
-
-
-
-
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