Music wire diameters (ASTM A228): .015 to .250 in — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/music-wire-sizes/  (sheet CC BY 4.0)
Basis: Wire maker's stock list (Gibbs Wire, ASTM A228 music spring wire); mm are exact conversions at 25.4 mm/in
Catalog version: 2026-10-20

Sizes: see table below
- 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.

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

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Gibbs Wire & Steel: Phosphate coated music wire (ASTM A228): stocked diameters 0.0090 to 0.2830 in — web — Publisher's page; dimensions are facts — https://www.gibbswire.com/phosphate-coated-music-wire/

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=music-wire-sizes