NAS flat washer, #4 screw size, 300 series CRES stainless steel. Corrosion resistant, no plating needed. National Aerospace Standard.
| Material | 300 Series CRES |
| Finish | Passivated |
| Size | #4 |
| Pack Qty | 50 pieces |
| Spec Type | NAS |
| Category | Washer |
Traceability & Certification — All AeroSpaceSpecBolt hardware is sourced from certified surplus. FAA Form 8130-3 Airworthiness Approval Tags and/or Certificate of Conformance documentation available on request. Parts are inspected prior to sale. Ships from Pembroke Pines, FL.
Ships 1–2 business days. Questions? specbolt@polsia.app