# Music wire diameters (ASTM A228): .015 to .250 in

> What diameters does music wire come in, in mm?

- Category: Hardware › Materials & stock
- Kind: Standard part
- Basis: Wire maker's stock list (Gibbs Wire, ASTM A228 music spring wire); mm are exact conversions at 25.4 mm/in
- Page: https://xemstudio.com/objects/music-wire-sizes/ · JSON: https://xemstudio.com/api/geometry?object=music-wire-sizes · Plain text: https://xemstudio.com/objects/music-wire-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

- Music wire (ASTM A228 spring wire) is sold by decimal-inch diameter. The table lists diameters from .015 to .250 in that appear in a wire maker's stock list, with the exact mm value; the fractional name is given where the decimal is that fraction.
- The maker stocks many more diameters, 0.0090 to 0.2830 in; the table is a selection, not the whole list.
- Diameter tolerances are set by ASTM A228 (not reproduced here).
- No file: a wire is a plain cylinder; use the diameter for pushrod bends, landing-gear sockets, hinge pins and Z-bend holes.

## Sizes

| diameter | fraction | mm |
|---|---|---|
| .015 in | — | 0.381 |
| .020 in | — | 0.508 |
| .025 in | — | 0.635 |
| .032 in | — | 0.813 |
| .039 in | — | 0.991 |
| .047 in | 3/64 | 1.194 |
| .055 in | — | 1.397 |
| .0625 in | 1/16 | 1.587 |
| .078 in | 5/64 | 1.981 |
| .094 in | 3/32 | 2.388 |
| .125 in | 1/8 | 3.175 |
| .156 in | 5/32 | 3.962 |
| .187 in | 3/16 | 4.75 |
| .250 in | 1/4 | 6.35 |

## Where the files are

- Gibbs Wire & Steel: [Phosphate coated music wire (ASTM A228): stocked diameters 0.0090 to 0.2830 in](https://www.gibbswire.com/phosphate-coated-music-wire/) — web — Publisher's page; dimensions are facts

## Questions

**What is 1/16 in music wire in mm?**

1.5875 mm (.0625 in).

**What is 3/32 in music wire in mm?**

2.3876 mm (.094 in listed; 3/32 in is .09375 in).

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