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Hex nuts, inch: #4-40 to 3/4-10 (ASME B18.2.2)
What size is a 5/16-18 nut? · Standard part · basis: ASME B18.2.2 finished hex nuts and machine screw nuts: width across flats F, thickness H
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 12 in table
Notes
- Threads are plain cylinders at the major diameter, as every thread on this site. The bore is the major diameter.
Sizes
| thread | af_in | thickness_in |
|---|---|---|
| 1/4-20 | 0.4375 | 0.2188 |
| 5/16-18 | 0.5 | 0.2656 |
| 3/8-16 | 0.5625 | 0.3281 |
| 7/16-14 | 0.6875 | 0.375 |
| 1/2-13 | 0.75 | 0.4375 |
| 5/8-11 | 0.9375 | 0.5469 |
| 3/4-10 | 1.125 | 0.6406 |
| #4-40 | 0.25 | 0.0938 |
| #6-32 | 0.3125 | 0.1094 |
| #8-32 | 0.3438 | 0.125 |
| #10-24 | 0.375 | 0.125 |
| #10-32 | 0.375 | 0.125 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ASME | ASME B18.2.2 Nuts for general applications (inch) | standard | ASME; dimensions are facts verify |
Free files
★ Free files 12 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| nut-1-4-20 | 1/4-20 finished hex nut: 0.4375 in AF × 0.2188 in | STEP · STL |
| nut-5-16-18 | 5/16-18 finished hex nut: 0.5 in AF × 0.2656 in | STEP · STL |
| nut-3-8-16 | 3/8-16 finished hex nut: 0.5625 in AF × 0.3281 in | STEP · STL |
| nut-7-16-14 | 7/16-14 finished hex nut: 0.6875 in AF × 0.375 in | STEP · STL |
| nut-1-2-13 | 1/2-13 finished hex nut: 0.75 in AF × 0.4375 in | STEP · STL |
| nut-5-8-11 | 5/8-11 finished hex nut: 0.9375 in AF × 0.5469 in | STEP · STL |
| nut-3-4-10 | 3/4-10 finished hex nut: 1.125 in AF × 0.6406 in | STEP · STL |
| nut-4-40 | #4-40 machine screw nut: 0.25 in AF × 0.09375 in | STEP · STL |
| nut-6-32 | #6-32 machine screw nut: 0.3125 in AF × 0.1094 in | STEP · STL |
| nut-8-32 | #8-32 machine screw nut: 0.3438 in AF × 0.125 in | STEP · STL |
| nut-10-24 | #10-24 machine screw nut: 0.375 in AF × 0.125 in | STEP · STL |
| nut-10-32 | #10-32 machine screw nut: 0.375 in AF × 0.125 in | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=hex-nuts-inch

Fits with
Free
Hex bolts, inch: 1/4-20 to 3/4-10 (ASME B18.2.1)7 sizes★ 47 filesFree
Flat washers, inch: SAE and USS, 1/4 to 3/4 in (ASME B18.21.1 Type A)14 sizes★ 14 filesFree
Socket head cap screws, inch: #10-24, #10-32, 5/16-18, 3/8-16, 1/2-13 (ASME B18.3)5 sizes★ 25 filesFree
Button head socket cap screws, inch: #4-40 to 1/2-13 (ASME B18.3)9 sizes★ 25 filesFree
Imperial machine screws: #4-40, #6-32, #8-32, 1/4-204 sizes★ 18 files





Questions
5/16-18 nut?
1/2 in AF, 17/64 in thick.