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Dowel pins, 2–6 mm (ISO 2338 / DIN 6325)
What hole size does a 3 mm dowel pin need for a press fit versus a slip fit? · Hardware · basis: ISO 2338 (h8) and DIN 6325 (m6) pin tolerances; fits per ISO 286
- sizes
- 5 in table
Notes
- Press fit in a print: pin diameter − 0.05 mm (and print slightly undersize holes, then ream). Slip fit for a hinge: pin + 0.15–0.2 mm.
- Common lengths 6–40 mm; 1.5 × diameter chamfer on each end.
Sizes
| dia_mm | press_fit_hole_mm | slip_fit_hole_mm | common_lengths_mm |
|---|---|---|---|
| 2 | 1.95 | 2.2 | 8, 10, 12, 16, 20 |
| 3 | 2.95 | 3.2 | 10, 12, 16, 20, 30 |
| 4 | 3.95 | 4.2 | 12, 16, 20, 30, 40 |
| 5 | 4.95 | 5.2 | 16, 20, 30, 40 |
| 6 | 5.95 | 6.2 | 20, 30, 40, 50 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| McMaster-Carr | Dowel pins (free STEP/IGES/STL per part, for your own design use; no redistribution) | STEP, IGES, STL, PDF | McMaster-Carr site terms: personal design use, no redistribution verify |
| Wikipedia | Dowel | web | CC BY-SA 4.0 (text) |
Free files
★ Free files 23 parts, generated by Xem Studio from the standard. CC BY 4.0. Threads are plain cylinders at major diameter. index.json
| dowel-2x8 | Ø2 × 8, chamfered | STEP · STL |
| dowel-2x10 | Ø2 × 10, chamfered | STEP · STL |
| dowel-2x12 | Ø2 × 12, chamfered | STEP · STL |
| dowel-2x16 | Ø2 × 16, chamfered | STEP · STL |
| dowel-2x20 | Ø2 × 20, chamfered | STEP · STL |
| dowel-3x10 | Ø3 × 10, chamfered | STEP · STL |
| dowel-3x12 | Ø3 × 12, chamfered | STEP · STL |
| dowel-3x16 | Ø3 × 16, chamfered | STEP · STL |
| dowel-3x20 | Ø3 × 20, chamfered | STEP · STL |
| dowel-3x30 | Ø3 × 30, chamfered | STEP · STL |
| dowel-4x12 | Ø4 × 12, chamfered | STEP · STL |
| dowel-4x16 | Ø4 × 16, chamfered | STEP · STL |
| dowel-4x20 | Ø4 × 20, chamfered | STEP · STL |
| dowel-4x30 | Ø4 × 30, chamfered | STEP · STL |
| dowel-4x40 | Ø4 × 40, chamfered | STEP · STL |
| dowel-5x16 | Ø5 × 16, chamfered | STEP · STL |
| dowel-5x20 | Ø5 × 20, chamfered | STEP · STL |
| dowel-5x30 | Ø5 × 30, chamfered | STEP · STL |
| dowel-5x40 | Ø5 × 40, chamfered | STEP · STL |
| dowel-6x20 | Ø6 × 20, chamfered | STEP · STL |
| dowel-6x30 | Ø6 × 30, chamfered | STEP · STL |
| dowel-6x40 | Ø6 × 40, chamfered | STEP · STL |
| dowel-6x50 | Ø6 × 50, chamfered | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=dowel-pins-metric
Fits with
Questions
What hole size for a 3 mm dowel pin press fit?
2.95 mm for a press fit, 3.2 mm for a slip fit (ISO 2338). In a print, model 2.9 mm and ream to 2.95.
Can I use a 3 mm dowel pin as a hinge pin in a 3D print?
Yes: 3.2 mm hole in the moving part, 2.95 mm press fit in the fixed part. Lengths 10–30 mm are common; pins are hardened steel, chamfered 1.5 × d.