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Hex nuts M8, M10, M12, 3/8 in and 1/2 in (flywheel weights)
What are the dimensions of the hex nuts that fill the flywheel pockets? · Hardware · basis: ISO 4032 (M8, M10, M12) and ASME B18.2.2 finished hex (3/8, 1/2 in) envelopes; bore at the thread major Ø
Long Earth Society build part. Flywheels you load with hardware-store nuts. The engines
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 5 in table
Notes
- Hex nut envelopes: across flats × thickness, across corners, and a bore at the thread major Ø (thread not drawn).
- M8 13 × 6.8 (AC 15.01); M10 16 × 8.4 (18.48); M12 18 × 10.8 (20.78); 3/8 in 14.29 × 8.33 (16.50); 1/2 in 19.05 × 11.11 (22.00).
- Each sits in the matching flywheel pocket with one flat facing outward, flush with the rim face.
Sizes
| file | thread | across flats | across corners | thickness | bore |
|---|---|---|---|---|---|
| nut-m8 | M8 | 13.0 | 15.01 | 6.8 | 8.0 |
| nut-m10 | M10 | 16.0 | 18.48 | 8.4 | 10.0 |
| nut-m12 | M12 | 18.0 | 20.78 | 10.8 | 12.0 |
| nut-3-8in | 3/8 in | 14.29 | 16.5 | 8.33 | 9.53 |
| nut-1-2in | 1/2 in | 19.05 | 22.0 | 11.11 | 12.7 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ISO | ISO 4032 Hexagon regular nuts (style 1) | standard | ISO verify |
| ASME | ASME B18.2.2 Nuts for general applications | standard | ASME verify |
| Long Earth Society | Engine builds | web, video | LES site |
Free files
★ Free files 5 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| nut-m8 | M8 hex nut, 13 across flats × 6.8: the flywheel weight | STEP · STL |
| nut-m10 | M10 hex nut, 16 across flats × 8.4: the flywheel weight | STEP · STL |
| nut-m12 | M12 hex nut, 18 across flats × 10.8: the flywheel weight | STEP · STL |
| nut-3-8in | 3/8 in hex nut, 14.29 across flats × 8.33: the flywheel weight | STEP · STL |
| nut-1-2in | 1/2 in hex nut, 19.05 across flats × 11.11: the flywheel weight | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=hex-nut-weights
How it fits
Goes in or on
Flywheels Ø100–Ø200 with hex-nut rim pocketshex pocket at the across-flatsAlternatives
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Questions
What are M10 hex nut dimensions?
16 across flats, 18.48 across corners, 8.4 thick (ISO 4032).
What are 1/2 in hex nut dimensions?
3/4 in (19.05) across flats, 7/16 in (11.11) thick (ASME B18.2.2 finished hex).