# Two-hole nuts, DIN 547: M3–M10 outside diameter, height, pin-hole size, spacing and depth

> What are the DIN 547 two-hole nut dimensions (outside diameter, height, pin holes and spacing) for M3 to M10?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: fasteners.eu DIN 547 table (08/2006: d1, m, d2, e, t), cross-checked against fasten.it and spot checks of Aspen and AMF listings
- Page: https://xemstudio.com/objects/two-hole-nuts-din-547/ · JSON: https://xemstudio.com/api/geometry?object=two-hole-nuts-din-547 · Plain text: https://xemstudio.com/objects/two-hole-nuts-din-547/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, outside diameter d1, height m, pin-hole diameter d2, pin-hole centre distance e, pin-hole depth t (min–max). The model uses the midpoint of t.
- Thread drawn as a plain bore at the major diameter.

## 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 |
|---|---|---|---|---|
| thread (plain bore at the major Ø) | M3 to M10 | ISO metric screw or stud of the same size | designed | all |
| 2 pin holes in the top face | d2 at spacing e (M6 Ø2.5 at 10, M10 Ø3.5 at 15) | face (pin) spanner, DIN 3116 | designed | all |

## Sizes

| thread | d1 | m | d2 | e | t min | t max |
|---|---|---|---|---|---|---|
| M3 | 8 | 2.5 | 1.5 | 5.5 | 1.3 | 1.7 |
| M4 | 10 | 3.5 | 1.5 | 7 | 1.8 | 2.2 |
| M5 | 12 | 4.2 | 2 | 8 | 2.3 | 2.7 |
| M6 | 14 | 5 | 2.5 | 10 | 2.8 | 3.2 |
| M8 | 18 | 6.5 | 3 | 13 | 3.3 | 3.8 |
| M10 | 22 | 8 | 3.5 | 15 | 3.8 | 4.3 |

## Where the files are

- fasteners.eu: [DIN 547 round nuts with drilled holes in one face: m, dh, e, t](https://www.fasteners.eu/standards/DIN/547/) — web — Publisher's page; dimensions are facts
- fasten.it: [DIN 547 round nuts with drilled holes in one face (08/2006)](https://fasten.it/en/norms/norm/din_547) — web — Publisher's page; dimensions are facts

## Free STEP/STL (6 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/two-hole-nuts-din-547/index.json

- din547-m3: [STEP](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m3.step) · [STL](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m3.stl) — DIN 547 M3: Ø8 × 2.5, two Ø1.5 holes 5.5 apart, 1.5 deep
- din547-m4: [STEP](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m4.step) · [STL](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m4.stl) — DIN 547 M4: Ø10 × 3.5, two Ø1.5 holes 7 apart, 2.0 deep
- din547-m5: [STEP](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m5.step) · [STL](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m5.stl) — DIN 547 M5: Ø12 × 4.2, two Ø2 holes 8 apart, 2.5 deep
- din547-m6: [STEP](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m6.step) · [STL](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m6.stl) — DIN 547 M6: Ø14 × 5, two Ø2.5 holes 10 apart, 3.0 deep
- din547-m8: [STEP](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m8.step) · [STL](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m8.stl) — DIN 547 M8: Ø18 × 6.5, two Ø3 holes 13 apart, 3.55 deep
- din547-m10: [STEP](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m10.step) · [STL](https://xemstudio.com/files/hardware/two-hole-nuts-din-547/din547-m10.stl) — DIN 547 M10: Ø22 × 8, two Ø3.5 holes 15 apart, 4.05 deep

## Questions

**What are the pin holes on an M6 two-hole nut?**

DIN 547 M6: two Ø2.5 mm holes 10 mm apart, about 2.8 to 3.2 mm deep, in a Ø14 × 5 mm nut.

**What tool fits a DIN 547 nut?**

A face (pin) spanner whose pins match the hole diameter and spacing, e.g. DIN 3116.

## Fits with

- [Slotted round nuts, DIN 546: M2–M20 outside diameter, height, slot width and depth](https://xemstudio.com/objects/slotted-round-nuts-din-546/)
- [Knurled nuts, DIN 466 (high) and DIN 467 (low): M1–M10 knurl diameter, collar, height](https://xemstudio.com/objects/knurled-nuts-din-466-467/)
- [Hex nuts, M2–M8 (ISO 4032)](https://xemstudio.com/objects/hex-nuts-metric/)
- [Bearing locknuts KM, DIN 981 / ISO 2982-2: KM0–KM10 (M10×0.75–M50×1.5) outside diameter, width, slots](https://xemstudio.com/objects/bearing-locknuts-km-din-981/)