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Model Engineer (M.E.)
Thread Form
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- p = Pitch = 1/TPI
- h = Basic Depth of Thread = 0.640327p
- r = Basic Radius = 0.137329p
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Thread Tables
| Nominal Diameter |
T.P.I. |
Basic Depth of Thread |
Basic Major Diameter |
Basic Effective Diameter |
Basic Minor Diameter |
Tapping Drill |
Clearing Drill |
| (inch) |
(n/a) |
(inch) |
(inch) |
(inch) |
(inch) |
(mm) |
(mm) |
| 1/8 |
40 |
0.0160 |
0.1250 |
0.1090 |
0.0930 |
2.55 |
3.3 |
| 5/32 |
40 |
0.0160 |
0.1563 |
0.1402 |
0.1242 |
3.3 |
4.1 |
| 3/16 |
40 |
0.0160 |
0.1875 |
0.1715 |
0.1555 |
4.1 |
4.9 |
| 7/32 |
40 |
0.0160 |
0.2188 |
0.2027 |
0.1867 |
4.9 |
5.7 |
| 1/4 |
40 |
0.0160 |
0.2500 |
0.2340 |
0.2180 |
5.75 |
6.5 |
| 9/32 |
32 |
0.0200 |
0.2813 |
0.2612 |
0.2412 |
6.3 |
7.3 |
| 5/16 |
32 |
0.0200 |
0.3125 |
0.2925 |
0.2725 |
7.1 |
8.1 |
| 3/8 |
32 |
0.0200 |
0.3750 |
0.3550 |
0.3350 |
8.7 |
9.7 |
| 7/16 |
32 |
0.0200 |
0.4375 |
0.4175 |
0.3975 |
10.2 |
11.4 |
| 1/2 |
32 |
0.0200 |
0.5000 |
0.4800 |
0.4600 |
11.8 |
13.1 |
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