- Fits 1/2 in fasteners and has 0.531 in inside size with 1.062 in outside size
- Standard version washer with approximately 0.095 in thickness
- Made of carbon steel with typical minimum tensile strength comparable to 1020 steel for aircraft hardware applications
- Cadmium plated finish per QQ‑P‑416, Type II, Class 3 for thin, corrosion‑resistant chromate‑treated coating
| Type | Washer |
| Style | Flat Carbon Steel Aircraft, MS |
| Size | 1/2" |
| Material | Carbon Steel |
| Finish | Chromate Cadmium Finish |
| Finish Spec | Cadmium plated finish per QQ‑P‑416, Type II, Class 3 |
| Color | Gold Iridescent |
| NAS/AN Part No. | no direct AN/NAS designation |
| Nominal Inside Dia | .531" |
| Nominal Outside Dia | 1.062" |
| Nominal Thickness | 0.095" |
| Inside Dia Range | 0.526" min - 0.546" max |
| Outside Dia Range | 1.055" min - 1.092" max |
| Thickness Range | 0.086" - 0.104" |
| Mil-Spec | MS27183‑18 |
| Series | MS27183 |
