- Fits #4 fasteners and has 0125 inch inside Size, with 0312 inch outside Size
- Standard version washer with 0032 in thickness
- Made of 300/301 Stainless Steel with 75 KSI min UTS
- Passivated finish per QQ-P-35 specification
| Type | Washer |
| Style | Flat Stainless Steel Aircraft |
| Size | #4 |
| Material | Stainless Steel |
| Finish Spec | QQ-P-35 |
| Color | Plain |
| NAS Part No. | NAS1149CN432R |
| AN Part No. | AN960C-4 |
| Inside Dia. | 0.125 |
| Outside Dia. | 0.312 |
| Inside Dia. Tolerance | ±0.10 |
| Outside Dia. Tolerance | +0.020, -0.005 |
| Thickness | 0.032 |
| Material Spec | 300 SS |
