The Washer,lock, cataloged under National Stock Number 5310-01-659-0631, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Textron Aviation Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-659-0631 |
| Primary Part Number | NAS1288-4W |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| NAS1288-4W PRIMARY | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| NAS1288-4W | 3/9 Design control — primary reference Beechcraft Corporation Dba Textron Aviation |
NSN 5310-01-659-0631 is a Washer,lock, manufactured by Textron Aviation Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-659-0631 has 1 manufacturer part number on file: NAS1288-4W (Textron Aviation Inc).
Key specifications for NAS1288-4W: Part Name Assigned by Controlling Agency: WASHER; End Item Identification: AIRCONDITIONING COLD AIR UNIT. 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.