| AMERICAN NATIONAL FORM THREADS (60o angle) |
|||||||||||||
| DIA. |
UNC |
UNF |
NPT & NPS |
UNS |
DIA |
UNC |
UNF |
||||||
| Sizes in inches |
TPI |
Drill |
TPI |
Drill |
TPI |
Drill |
TPI |
Drill |
Size No |
TPI |
Drill |
TPI |
Drill |
| 1/16 |
|
|
|
|
27 |
6.3 |
64 |
1.2 |
0 |
|
|
80 |
1.25 |
| 3/32 |
|
|
|
|
|
|
48 |
1.85 |
1 |
64 |
1.55 |
72 |
1.55 |
| 1/8 |
|
|
|
|
27 |
8.7 |
40 |
2.6 |
2 |
56 |
1.85 |
64 |
1.9 |
| 5/32 |
|
|
|
|
|
|
32 & 40 |
3.2 & 3.3 |
3 |
48 |
2.1 |
56 |
2.15 |
| 3/16 |
|
|
|
|
|
|
32 & 40 |
4.0 & 4.0 |
4 |
40 |
2.35 |
48 |
2.4 |
| 7/32 |
|
|
|
|
|
|
24 & 32 |
4.5 & 4.8 |
5 |
40 |
2.65 |
44 |
2.7 |
| 1/4 |
20 |
5.1 |
28 |
5.5 |
18 |
11.1 |
24 & 32 |
5.30 & 5.6 |
6 |
32 |
2.85 |
40 |
2.95 |
| 5/16 |
18 |
6.6 |
24 |
6.9 |
|
|
20 & 32 |
6.7 & 7.2 |
8 |
32 |
3.5 |
36 |
3.5 |
| 3/8 |
16 |
8.0 |
24 |
8.5 |
18 |
14.5 |
20 |
8.30 |
10 |
24 |
3.9 |
32 |
4.1 |
| 7/16 |
14 |
9.4 |
20 |
9.9 |
|
|
24 |
10.0 |
12 |
24 |
4.5 |
28 |
4.70 |
| 1/2 |
13 |
10.8 |
20 |
11.5 |
14 |
18.0 |
12 & 24 |
10.5 & 11.5 |
|
|
|
|
|
| 9/16 |
12 |
12.2 |
18 |
12.9 |
|
|
|
|
|
|
|
|
|
| 5/8 |
11 |
13.5 |
18 |
14.5 |
|
|
12 |
13.9 |
|
|
|
|
|
| 11/16 |
|
|
|
|
|
|
11 & 16 |
15.0 & 15.9 |
|
|
|
|
|
| 3/4 |
10 |
16.5 |
16 |
17.5 |
14 |
23.25 |
12 |
16.7 |
|
|
|
|
|
| 7/8 |
9 |
19.5 |
14 |
20.4 |
|
|
12 |
20.2 |
|
|
|
|
|
| 1 |
8 |
22.25 |
12 |
23.25 |
11.5 |
29.0 |
14 |
23.5 |
|
|
|
|
|
| 1.1/8 |
7 |
25.0 |
12 |
26.5 |
|
|
|
|
|
|
|
|
|
| 1.1/4 |
7 |
28.0 |
12 |
29.5 |
11.5 |
38.0 |
|
|
|
|
|
|
|
| 1.3/8 |
6 |
30.75 |
12 |
32.75 |
|
|
|
|
|
|
|
|
|
| 1.1/2 |
6 |
34.0 |
12 |
36.0 |
|
|
|
|
|
|
|
|
|
| 1.3/4 |
5 |
39.5 |
|
|
|
|
|
|
|
|
|
|
|