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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? · Standard part · basis: fasteners.eu DIN 440 table (d1, d2, s), cross-checked against Westfield Fasteners, globalfastener, Böllhoff and Würth listings
Also called: din 440 dimensions, timber washer m12 44 mm, wood construction washer m10, din 440 r m16, large round washer for timber m20
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. Mating features
- sizes
- 13 in table
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.
Round washers for timber, DIN 440 form R: M5–M36 bore, outside… size chart
| 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 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits 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 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Westfield Fasteners | DIN 440 type R wood construction washers: d1, d2, s | web | Publisher's page; dimensions are facts |
| Würth | Washer DIN 440 R M12, 13.5 × 44 × 4 | web | Publisher's page; dimensions are facts |
Free files
★ Free files 13 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| din440r-m5 | DIN 440R M5: 5.5 × Ø18 × 2 | STEP · STL |
| din440r-m6 | DIN 440R M6: 6.6 × Ø22 × 2 | STEP · STL |
| din440r-m8 | DIN 440R M8: 9 × Ø28 × 3 | STEP · STL |
| din440r-m10 | DIN 440R M10: 11 × Ø34 × 3 | STEP · STL |
| din440r-m12 | DIN 440R M12: 13.5 × Ø44 × 4 | STEP · STL |
| din440r-m14 | DIN 440R M14: 15.5 × Ø50 × 4 | STEP · STL |
| din440r-m16 | DIN 440R M16: 17.5 × Ø56 × 5 | STEP · STL |
| din440r-m20 | DIN 440R M20: 22 × Ø72 × 6 | STEP · STL |
| din440r-m22 | DIN 440R M22: 24 × Ø80 × 6 | STEP · STL |
| din440r-m24 | DIN 440R M24: 26 × Ø85 × 6 | STEP · STL |
| din440r-m27 | DIN 440R M27: 30 × Ø98 × 6 | STEP · STL |
| din440r-m30 | DIN 440R M30: 33 × Ø105 × 6 | STEP · STL |
| din440r-m36 | DIN 440R M36: 39 × Ø125 × 8 | STEP · STL |
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.Plain text: sheet.txt · JSON: /api/geometry?object=round-washers-timber-din-440-r
Fits with
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.