3 Gauge Sheet Metal
Steel (MSG) 0.2391″
Galvanized —
Stainless 0.2500″
Aluminum 0.2294″
Steel: 6.07 mm · Stainless: 6.35 mm · Aluminum: 5.83 mm . The same gauge number is a different thickness in each material — always confirm which scale a drawing means, or better, specify decimal thickness.
Neighboring gauges (steel column)
| Gauge | Steel | Galvanized | Stainless | Aluminum |
|---|---|---|---|---|
| 3 | 0.2391 | — | 0.2500 | 0.2294 |
| 4 | 0.2242 | — | 0.2344 | 0.2043 |
| 5 | 0.2092 | — | 0.2187 | 0.1819 |
Measuring wire, not sheet? Wire uses the AWG scale — see AWG 3 (0.2294″ Ø). Aluminum sheet happens to share the AWG scale, which is why the aluminum column matches it.