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Carbon fibre square tube (box section) sizes, 4 to 20 mm
What sizes do carbon fibre square tubes come in? · Standard part · basis: Maker's product listings (Easy Composites box section)
Also called: carbon fiber square tube sizes, carbon box section sizes, 10mm square carbon tube, square carbon spar
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 5 in table
Notes
- Square carbon tube (box section) as listed: outer size, inner size and wall in mm. Lengths 1000 mm (4 and 6 mm) or 1000 / 2000 mm.
- Tolerance stated for the 6 × 4 section: ±0.25 mm on outer and inner size.
- No file: the corner radii are not published, and a square section drawn with invented corners would not be the real fit.
Carbon fibre square tube (box section) sizes, 4 to 20 mm size chart
| outer mm | inner mm | wall mm |
|---|---|---|
| 4 | 2.5 | 0.75 |
| 6 | 4 | 1 |
| 8 | 7 | 0.5 |
| 10 | 8 | 1 |
| 20 | 17 | 1.5 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Easy Composites | Carbon fibre box section (category: outer and inner size in each title) | web | Publisher's page; dimensions are facts |
| Easy Composites | 6mm (4mm) carbon fibre box section (OD / ID tolerance 0.25 mm) | web | Publisher's page; dimensions are facts |
| Easy Composites | Technical datasheet: carbon fibre pultrusions (tube, rod, strip, box section sizes) | web | Publisher's page; dimensions are facts |
Xem scan
File coming
No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.
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=carbon-fibre-square-tube-sizes
Questions
How thick is the wall of a 10 mm square carbon tube?
1 mm (10 outer, 8 inner) for the listed 10 × 8 box section.