# Carbon fibre rod sizes: round 0.28 to 12 mm, square 4 to 10 mm

> What diameters do solid carbon fibre rods come in?

- Category: RC planes › Carbon tubes and spars
- Kind: Standard part
- Basis: Maker's product listings (Easy Composites carbon fibre rod)
- Page: https://xemstudio.com/objects/carbon-fibre-rod-sizes/ · JSON: https://xemstudio.com/api/geometry?object=carbon-fibre-rod-sizes · Plain text: https://xemstudio.com/objects/carbon-fibre-rod-sizes/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.** True size, with no printing tolerance added.

## Notes

- Solid pultruded carbon rod as listed: round 0.28 to 12 mm, square 4, 5, 6, 8 and 10 mm, and a 3 mm half round. Lengths 1000 mm, most also 2000 mm (0.28 mm and the half round 1000 mm only).
- No file: a solid rod is a plain cylinder or bar; the diameter is the design number (bore it into your part at true size and add your own fit).

## Sizes

| section | size mm |
|---|---|
| round | 0.28 |
| round | 0.5 |
| round | 0.8 |
| round | 1 |
| round | 1.2 |
| round | 1.5 |
| round | 2 |
| round | 2.5 |
| round | 3 |
| round | 4 |
| round | 5 |
| round | 6 |
| round | 8 |
| round | 10 |
| round | 12 |
| square | 4 × 4 |
| square | 5 × 5 |
| square | 6 × 6 |
| square | 8 × 8 |
| square | 10 × 10 |
| half round | 3 (diameter) |

## Where the files are

- Easy Composites: [Carbon fibre rod (category: diameter in each title)](https://www.easycomposites.co.uk/carbon-fibre-rod) — web — Publisher's page; dimensions are facts
- Easy Composites: [Technical datasheet: carbon fibre pultrusions (tube, rod, strip, box section sizes)](https://media.easycomposites.eu/datasheets/EC-TDS-Carbon-Fibre-Pultrusions.pdf) — web — Publisher's page; dimensions are facts

## Questions

**What is the thinnest carbon rod?**

0.28 mm in this maker's list; the next sizes are 0.5, 0.8 and 1 mm.

## Fits with

- [Carbon fibre tube sizes: pultruded and roll-wrapped, 0.7 to 60 mm OD](https://xemstudio.com/objects/carbon-fibre-tube-sizes/)
- [Carbon fibre square tube (box section) sizes, 4 to 20 mm](https://xemstudio.com/objects/carbon-fibre-square-tube-sizes/)
- [Carbon fibre strip sizes: 3 × 0.5 to 12 × 2 mm](https://xemstudio.com/objects/carbon-fibre-strip-sizes/)
- [Music wire diameters (ASTM A228): .015 to .250 in](https://xemstudio.com/objects/music-wire-sizes/)