# Square thin nuts, DIN 562: M1.6–M10 width across flats and height

> What are the DIN 562 thin square nut dimensions, for example the M3 or M5 width and height?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: fasten.it's DIN 562 table (05/2013 edition), cross-checked against JC Fasteners' DIN 562 sheet and CDE Fasteners' DIN 562 data
- Page: https://xemstudio.com/objects/square-thin-nuts-din-562/ · JSON: https://xemstudio.com/api/geometry?object=square-thin-nuts-din-562 · Plain text: https://xemstudio.com/objects/square-thin-nuts-din-562/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Columns: thread d, width across flats s (max = nominal), height m (max = nominal). The 2013 edition gives s = 16 for M10 (the 1987 edition had 17).
- Files: square block with the thread as a plain bore at the major diameter, as for the other nuts on Xem. Real nuts may have slightly broken corners (e min is about 1.26 s).

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| square body | s × s × m: 3.2 × 3.2 × 1 (M1.6) to 16 × 16 × 5 (M10); M3 5.5 × 1.8 | nut-trap pocket or slot of the same size | socket | all |
| thread (plain bore at the major Ø) | d: M1.6 to M10 | screw of the same thread | designed | all |

## Sizes

| thread | s | m |
|---|---|---|
| M1.6 | 3.2 | 1.0 |
| M2 | 4 | 1.2 |
| M2.5 | 5 | 1.6 |
| M3 | 5.5 | 1.8 |
| M3.5 | 6 | 2.0 |
| M4 | 7 | 2.2 |
| M5 | 8 | 2.7 |
| M6 | 10 | 3.2 |
| M8 | 13 | 4.0 |
| M10 | 16 | 5.0 |

## Where the files are

- fasten.it: [DIN 562 square thin nuts (05/2013): s, m, e](https://fasten.it/norms/norm/din_562) — web — Publisher's page; dimensions are facts
- CDE Fasteners: [DIN 562 square thin nuts: width across flats and thickness](https://cdefasteners.com/sites/default/files/product-specs/metdin562.pdf) — web — Publisher's page; dimensions are facts

## Free STEP/STL (10 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/square-thin-nuts-din-562/index.json

- din562-m1p6: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m1p6.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m1p6.stl) — DIN 562 M1.6: 3.2 square × 1.0, thread as Ø1.6 bore
- din562-m2: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m2.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m2.stl) — DIN 562 M2: 4 square × 1.2, thread as Ø2 bore
- din562-m2p5: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m2p5.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m2p5.stl) — DIN 562 M2.5: 5 square × 1.6, thread as Ø2.5 bore
- din562-m3: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m3.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m3.stl) — DIN 562 M3: 5.5 square × 1.8, thread as Ø3 bore
- din562-m3p5: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m3p5.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m3p5.stl) — DIN 562 M3.5: 6 square × 2.0, thread as Ø3.5 bore
- din562-m4: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m4.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m4.stl) — DIN 562 M4: 7 square × 2.2, thread as Ø4 bore
- din562-m5: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m5.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m5.stl) — DIN 562 M5: 8 square × 2.7, thread as Ø5 bore
- din562-m6: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m6.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m6.stl) — DIN 562 M6: 10 square × 3.2, thread as Ø6 bore
- din562-m8: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m8.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m8.stl) — DIN 562 M8: 13 square × 4.0, thread as Ø8 bore
- din562-m10: [STEP](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m10.step) · [STL](https://xemstudio.com/files/hardware/square-thin-nuts-din-562/din562-m10.stl) — DIN 562 M10: 16 square × 5.0, thread as Ø10 bore

## Questions

**How big is an M3 thin square nut?**

DIN 562 M3: 5.5 mm square, 1.8 mm thick.

**What size nut trap fits an M10 DIN 562 square nut?**

The nut is 16 mm square and 5 mm thick; draw the pocket at 16 × 16 × 5 and add your process allowance.

## Fits with

- [Hex nuts, M2–M8 (ISO 4032)](https://xemstudio.com/objects/hex-nuts-metric/)
- [Nylon-insert lock nuts (nyloc), ISO 7040 and DIN 985, M3–M36: width across flats, height, bearing diameter + M10–M30 envelope files](https://xemstudio.com/objects/nylon-insert-lock-nuts-iso-7040-din-985/)
- [Hex flange nuts, DIN 6923: M3–M20 across flats, flange diameter, height, flange thickness + M5–M16 envelope files](https://xemstudio.com/objects/flange-nuts-din-6923/)
- [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/)