- Fits #4 fasteners and has 0125 inch inside Size, with 0312 inch outside Size
- Light version washer with 0016 in thickness
- Made of 2024-T3 Aluminum iwth 58 KSI min UTS
- Natural, untreated finish
| Type | Washer |
| Style | Flat Aluminum Aircraft |
| Size | #4 |
| Material | Aluminum |
| Color | Natural |
| NAS Part No. | NAS1149DN416H |
| AN Part No. | AN960D-4L |
| Inside Dia. | 0.125 |
| Outside Dia. | 0.312 |
| Inside Dia. Tolerance | ±0.10 |
| Outside Dia. Tolerance | +0.020, -0.005 |
| Thickness | 0.016 |
| Material Spec | 2024 T3 |
