The Washer,lock, cataloged under National Stock Number 5310-00-989-0650, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-989-0650 |
| Primary Part Number | 7821764H09 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.219 INCHES NOMINAL IN |
| Material Thickness | 0.016 INCHES NOMINAL IN |
| Surface Treatment | NICKEL OVERALL |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 7821764H09 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 7821764H09 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-989-0650 is a Washer,lock, manufactured by Westinghouse Electric Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-989-0650 has 1 manufacturer part number on file: 7821764H09 (Westinghouse Electric Corp).
Key specifications for 7821764H09: Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.219 INCHES NOMINAL IN; Material Thickness: 0.016 INCHES NOMINAL IN; Special Features: 0.130 NOM HOLE SIZE. 5 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.