Thread | T.P.I UNC | T.P.I UNF | a | h | j (max) | t (max) | L |
0 |
* |
80 |
0.112-0.096 |
0.035 |
0.023 |
0.015 |
1/8 |
1 |
64 |
72 |
0.137-0.120 |
0.043 |
0.026 |
0.019 |
1/8 |
2 |
56 |
64 |
0.162-0.144 |
0.051 |
0.031 |
0.023 |
1/8 |
4 |
40 |
48 |
0.212-0.191 |
0.067 |
0.039 |
0.030 |
3/16 |
5 |
40 |
44 |
0.237-0.215 |
0.075 |
0.043 |
0.034 |
3/16 |
6 |
32 |
40 |
0.262-0.238 |
0.083 |
0.048 |
0.038 |
3/16 |
8 |
32 |
36 |
0.312-0.285 |
0.100 |
0.054 |
0.045 |
1/4 |
10 |
24 |
32 |
0.362-0.333 |
0.116 |
0.060 |
0.053 |
5/16 |
12 |
24 |
28 |
0.412-0.380 |
0.132 |
0.067 |
0.060 |
3/8 |
1/4 |
20 |
28 |
0.477-0.442 |
0.153 |
0.075 |
0.070 |
7/16 |
5/16 |
18 |
24 |
0.597-0.556 |
0.191 |
0.084 |
0.088 |
1/2 |
3/8 |
16 |
24 |
0.717-0.670 |
0.230 |
0.094 |
0.106 |
9/16 |
1/2 |
13 |
20 |
0.815-0.765 |
0.223 |
0.106 |
0.103 |
3/4 |
5/8 |
11 |
18 |
1.050-0.990 |
0.298 |
0.133 |
0.137 |
* |
* Heads will be undercut on lengths less than L |