Light series flat washer, #4 screw size. Standard aircraft washer for #4 screws and bolts. Cadmium plated steel. Used under bolt heads and nuts for load distribution on thin sheet metal.
| Material | Steel |
| Finish | Cadmium Plated |
| Size | #4 |
| Pack Qty | 50 pieces |
| Spec Type | AN |
| 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.
This hardware is the direct AN/MS/NAS equivalent for the following aircraft manufacturer callouts. Confirm with your A&P or refer to AC 43.13-1B before installation.
| OEM Part Number | Manufacturer | Aircraft Models |
|---|---|---|
| 0821004-1 | Cessna | C172, C182, C152 |
| PM10-9604 | Mooney | M20C, M20E, M20J |
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Ships 1–2 business days. Questions? specbolt@polsia.app