Coarse Threads FineThreads
Size |
Threads / inch |
Major Diameter (in.) |
Minor Diameter (in.) |
Lead Angle (Deg.) |
Lead Angle (Min.) |
1 |
64 |
0.073 |
0.056 |
4 |
31 |
2 |
56 |
0.086 |
0.067 |
4 |
22 |
3 |
48 |
0.099 |
0.076 |
4 |
26 |
4 |
40 |
0.112 |
0.085 |
4 |
45 |
5 |
40 |
0.125 |
0.098 |
4 |
11 |
6 |
32 |
0.138 |
0.101 |
4 |
50 |
8 |
32 |
0.164 |
0.130 |
3 |
58 |
10 |
24 |
0.190 |
0.145 |
4 |
39 |
12 |
24 |
0.216 |
0.171 |
4 |
1 |
1/4 |
20 |
0.250 |
0.196 |
4 |
11 |
5/16 |
18 |
0.313 |
0.252 |
3 |
40 |
3/8 |
16 |
0.375 |
0.307 |
3 |
24 |
7/16 |
14 |
0.438 |
0.360 |
3 |
20 |
1/2 |
13 |
0.5 |
0.417 |
3 |
7 |
9/16 |
12 |
0.563 |
0.472 |
2 |
59 |
5/8 |
11 |
0.625 |
0.527 |
2 |
56 |
3/4 |
10 |
0.750 |
0.642 |
2 |
40 |
7/8 |
9 |
0.875 |
0.755 |
2 |
31 |
1 |
8 |
1.000 |
0.865 |
2 |
29 |
Size |
Threads / inch |
Major Diameter (in.) |
Minor Diameter (in.) |
Lead Angle (Deg.) |
Lead Angle (Min.) |
0 |
80 |
0.060 |
0.465 |
4 |
23 |
1 |
72 |
0.073 |
0.058 |
3 |
57 |
2 |
64 |
0.086 |
0.069 |
3 |
45 |
3 |
56 |
0.099 |
0.080 |
3 |
43 |
4 |
48 |
0.112 |
0.089 |
3 |
51 |
5 |
44 |
0.125 |
0.100 |
3 |
45 |
6 |
40 |
0.138 |
0.111 |
3 |
44 |
8 |
36 |
0.164 |
0.134 |
3 |
28 |
10 |
32 |
0.190 |
0.156 |
3 |
21 |
12 |
28 |
0.216 |
0.177 |
3 |
22 |
1/4 |
28 |
0.250 |
0.211 |
2 |
52 |
5/16 |
24 |
0.313 |
0.267 |
2 |
40 |
3/8 |
24 |
0.375 |
0.330 |
2 |
11 |
7/16 |
20 |
0.438 |
0.338 |
2 |
15 |
1/2 |
20 |
0.5 |
0.446 |
1 |
57 |
9/16 |
18 |
0.563 |
0.502 |
1 |
55 |
5/8 |
18 |
0.625 |
0.565 |
1 |
43 |
3/4 |
16 |
0.750 |
0.682 |
1 |
36 |
7/8 |
14 |
0.875 |
0.798 |
1 |
34 |
1 |
12 |
1.000 |
0.910 |
1 |
36 |
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Ness Engineering, Inc.
P.O. Box 261501
San Diego, CA 92196
(858) 566-2372
(858) 240-2299 FAX
© Richard M. Ness and Ness Engineering, Inc. |
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