Xem Studiomeasured geometryLibrary › Hardware › Hex nuts M8, M10, M12, 3/8 in and 1/2 in
M12 hex nut, 18 across flats × 10.8
M12 hex nut, 18 across flats × 10.8: the flywheel weight
Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.
STEP STL free, CC BY 4.0 (credit "Xem Studio")
Dimensions
| file | nut-m12 |
|---|---|
| thread | M12 |
| across flats | 18.0 |
| across corners | 20.78 |
| thickness | 10.8 |
| bore | 12.0 |
Let your AI pull this. Add
Set it up →https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.From the full sheet
Hex nuts M8, M10, M12, 3/8 in and 1/2 in (flywheel weights): every size, notes, mating features and sources. What are the dimensions of the hex nuts that fill the flywheel pockets?