- Fits #4 fasteners and has 0.114 inch inside size, with 0.209 inch outside size, for use with right-hand threads only
- Split lock washer with approximately 0.025 inch thickness to help prevent loosening under vibration
- Made of carbon spring steel for durable spring action in aircraft and industrial assemblies
- Cadmium plated finish per QQ‑P‑416, Type II, Class 3 specification with yellow chromate appearance
| Type | Lock Washer |
| Style | Split Helical |
| Size | #4 |
| Material | Carbon Steel |
| Finish | Cadmium Plated with Chromate |
| Finish Spec | QQ‑P‑416, Type II, Class 3 |
| Color | Yellow |
| NAS/AN Part No. | NA |
| Nominal Inside Dia | 0.114" |
| Nominal Outside Dia | 0.21" |
| Nominal Thickness | 0.03" |
| Inside Dia Range | 0.108" - 0.120" |
| Outside Dia Range | 0.200" - 0.218" |
| Thickness Range | 0.020" - 0.030" |
| Mil-Spec | MS35338‑40 |
| Series | MS35338 |
| Hardness | Rockwell C 4050 |
