American Standard UNC-Coarse (60°) |
Specifications |
Number of teeth(T) |
Outer diameter (D) |
Rolling diameter |
||
Maximum |
Minimum |
Max |
Minimum |
||
NO:1 |
64 |
1.84 |
1.74 |
1.58 |
1.56 |
NO: 2 |
56 |
2.17 |
2.06 |
1.87 |
1.85 |
NO:3 |
48 |
2.50 |
2.38 |
2.14 |
2.11 |
NO:4 |
40 |
2.82 |
2.69 |
2.40 |
2.37 |
NO:5 |
40 |
3.15 |
3.02 |
2.72 |
2.69 |
NO:6 |
32 |
3.48 |
3.33 |
2.94 |
2.91 |
NO:8 |
32 |
4.14 |
3.99 |
3.60 |
3.57 |
NO:10 |
24 |
4.80 |
4.62 |
4.09 |
4.05 |
NO:12 |
24 |
5.46 |
5.28 |
4.75 |
4.70 |
1/4 |
20 |
6.32 |
6.12 |
5.50 |
5.45 |
5/16 |
18 |
7.91 |
7.69 |
6.98 |
6.93 |
3/8 |
16 |
9.49 |
9.25 |
8.45 |
8.40 |
7/16 |
14 |
11.08 |
10.81 |
9.89 |
9.83 |
1/2 |
13 |
12.66 |
12.38 |
11.39 |
11.32 |
9/16 |
12 |
14.24 |
13.96 |
12.87 |
12.80 |
5/8 |
11 |
15.83 |
15.53 |
14.33 |
14.26 |
3/4 |
10 |
19.00 |
18.68 |
17.34 |
17.27 |
7/8 |
9 |
22.17 |
21.82 |
20.34 |
20.26 |
1" |
8 |
25.35 |
24.97 |
23.28 |
23.20 |
11/8 |
7 |
28.52 |
28.10 |
26.16 |
26.07 |