# Round washers for timber, DIN 440 form R: M5–M36 bore, outside diameter, thickness

> What bore, outside diameter and thickness does a DIN 440 form R timber washer have for M5 to M36?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: fasteners.eu DIN 440 table (d1, d2, s), cross-checked against Westfield Fasteners, globalfastener, Böllhoff and Würth listings
- Page: https://xemstudio.com/objects/round-washers-timber-din-440-r/ · JSON: https://xemstudio.com/api/geometry?object=round-washers-timber-din-440-r · Plain text: https://xemstudio.com/objects/round-washers-timber-din-440-r/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, bore d1, outside diameter d2, thickness s. Form R has a round hole (form V has a square hole). DIN 440 was replaced by ISO 7094 but is still widely sold.
- M33 is omitted (sources disagree). Edges drawn sharp.

## 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 |
|---|---|---|---|---|
| bore | d1 (M12 13.5, M24 26) | bolt or coach screw of the listed thread | designed | all |
| bearing face | Ø d2 (M12 44, M24 85) | timber surface | designed | all |

## Sizes

| thread | d1 | d2 | s |
|---|---|---|---|
| M5 | 5.5 | 18 | 2 |
| M6 | 6.6 | 22 | 2 |
| M8 | 9 | 28 | 3 |
| M10 | 11 | 34 | 3 |
| M12 | 13.5 | 44 | 4 |
| M14 | 15.5 | 50 | 4 |
| M16 | 17.5 | 56 | 5 |
| M20 | 22 | 72 | 6 |
| M22 | 24 | 80 | 6 |
| M24 | 26 | 85 | 6 |
| M27 | 30 | 98 | 6 |
| M30 | 33 | 105 | 6 |
| M36 | 39 | 125 | 8 |

## Where the files are

- Westfield Fasteners: [DIN 440 type R wood construction washers: d1, d2, s](https://www.westfieldfasteners.co.uk/Standards/Washer-WoodCon440R-M.html) — web — Publisher's page; dimensions are facts
- Würth: [Washer DIN 440 R M12, 13.5 × 44 × 4](https://eshop.wurth.ae/Washer-with-round-hole-Mainly-for-wood-construction-DIN-440-plain-steel-WSH-WO-DIN440-R-135X44X4/045414.sku/en/US/AED) — web — Publisher's page; dimensions are facts

## Free STEP/STL (13 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/index.json

- din440r-m5: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m5.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m5.stl) — DIN 440R M5: 5.5 × Ø18 × 2
- din440r-m6: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m6.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m6.stl) — DIN 440R M6: 6.6 × Ø22 × 2
- din440r-m8: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m8.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m8.stl) — DIN 440R M8: 9 × Ø28 × 3
- din440r-m10: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m10.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m10.stl) — DIN 440R M10: 11 × Ø34 × 3
- din440r-m12: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m12.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m12.stl) — DIN 440R M12: 13.5 × Ø44 × 4
- din440r-m14: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m14.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m14.stl) — DIN 440R M14: 15.5 × Ø50 × 4
- din440r-m16: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m16.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m16.stl) — DIN 440R M16: 17.5 × Ø56 × 5
- din440r-m20: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m20.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m20.stl) — DIN 440R M20: 22 × Ø72 × 6
- din440r-m22: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m22.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m22.stl) — DIN 440R M22: 24 × Ø80 × 6
- din440r-m24: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m24.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m24.stl) — DIN 440R M24: 26 × Ø85 × 6
- din440r-m27: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m27.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m27.stl) — DIN 440R M27: 30 × Ø98 × 6
- din440r-m30: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m30.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m30.stl) — DIN 440R M30: 33 × Ø105 × 6
- din440r-m36: [STEP](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m36.step) · [STL](https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m36.stl) — DIN 440R M36: 39 × Ø125 × 8

## Questions

**How big is an M12 timber washer?**

DIN 440 R M12: 13.5 mm bore, 44 mm outside, 4 mm thick.

**What is the difference between DIN 440 R and V?**

R has a round hole for ordinary bolts and screws; V has a square hole that stops a carriage bolt's square neck from turning.

## Fits with

- [Square washers for timber, DIN 436: M10–M36 side length, hole, thickness](https://xemstudio.com/objects/square-washers-din-436/)
- [Large (fender) washers, DIN 9021 / ISO 7093: M2.5–M36 bore, outside diameter, thickness + nylon variant + 8 washer files](https://xemstudio.com/objects/large-washers-din-9021-iso-7093/)
- [Flat washers, M2–M8 (ISO 7089)](https://xemstudio.com/objects/flat-washers-metric/)
- [Carriage bolts, ASME B18.5 round head square neck, #10 to 1 in: head, square neck, body diameter + envelope models](https://xemstudio.com/objects/carriage-bolts-asme-b18-5/)