# M4 nut trap (hex pocket for an ISO 4032 nut)

> What size is an M4 nut trap?

- Category: Joinery › 3D-print connectors
- Kind: Hardware
- Basis: Xem Studio design — geometry computed in the generator from traditional proportions
- Page: https://xemstudio.com/objects/nut-trap-m4/ · JSON: https://xemstudio.com/api/geometry?object=nut-trap-m4 · Plain text: https://xemstudio.com/objects/nut-trap-m4/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files Xem Studio Design License (free to use and sell from, not to redistribute as files: https://xemstudio.com/license/)
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 15.0 | 15.0 | 9.2 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).
- A hex pocket the size of an ISO 4032 M4 nut (7 mm across flats, 3.2 mm thick) with the screw hole through: the standard way to put a metal thread in a print.
- Drawn at the nut's true size: add your printer's allowance to the pocket (often 0.2–0.4 mm on the flats) so the nut drops in.

## Sizes

| dimension | value |
|---|---|
| stock | 15 × 15 × 9.2 mm test block |
| parts | block, nut |
| hex pocket | 7 mm across flats (nut size), 3.2 mm deep (nut height) |
| screw hole | Ø4 mm (nominal M4) |
| nut | ISO 4032 M4: 7 mm AF, 3.2 mm thick |
| assembles | drop the nut into the pocket, screw from below |
| holds | the nut from turning while the screw is driven |

## Where the files are

- Xem Studio: [Joinery design (geometry computed in the generator from traditional proportions)](https://xemstudio.com/) — web — Xem Studio design

## Free STEP/STL (3 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/nut-trap-m4/index.json · license: https://xemstudio.com/files/hardware/nut-trap-m4/LICENSE.md

- nut-trap-m4-block: [STEP](https://xemstudio.com/files/hardware/nut-trap-m4/nut-trap-m4-block.step) · [STL](https://xemstudio.com/files/hardware/nut-trap-m4/nut-trap-m4-block.stl) — Block with a 7 mm hex pocket, 3.2 mm deep, and a Ø4 screw hole
- nut-trap-m4-nut: [STEP](https://xemstudio.com/files/hardware/nut-trap-m4/nut-trap-m4-nut.step) · [STL](https://xemstudio.com/files/hardware/nut-trap-m4/nut-trap-m4-nut.stl) — M4 hex nut, 7 AF × 3.2
- nut-trap-m4-assembled: [STEP](https://xemstudio.com/files/hardware/nut-trap-m4/nut-trap-m4-assembled.step) · [STL](https://xemstudio.com/files/hardware/nut-trap-m4/nut-trap-m4-assembled.stl) — All parts in their assembled position (each part its own solid)

## Questions

**How big is an M4 nut trap?**

7 mm across flats and 3.2 mm deep at true size, plus your fit allowance.

**What size is an M4 nut?**

ISO 4032 M4: 7 mm across flats, 3.2 mm thick.

## Fits with

- [M8 captive nut slot (side-loaded)](https://xemstudio.com/objects/captive-nut-slot-m8/)
- [Hex nuts, M2–M8 (ISO 4032)](https://xemstudio.com/objects/hex-nuts-metric/)
- [Heat-set insert holes: hole cutters and test bosses for every insert size](https://xemstudio.com/objects/heat-set-insert-holes/)