The Washer,lock, cataloged under National Stock Number 5310-01-431-5594, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-431-5594 |
| Primary Part Number | 6404609 FIND 14 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | FLAT EXTERNAL TEETH |
| Material Document and Classification | QQ-N-281, CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| Material | NICKEL ALLOY 400 OVERALL |
| Hole Diameter | 0.654 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 6404609 FIND 14 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 342-6404609 FIND 14 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5310-01-431-5594 is a Washer,lock, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-431-5594 has 1 manufacturer part number on file: 6404609 FIND 14 (Naval Sea Systems Command).
Key specifications for 6404609 FIND 14: Style Designator: FLAT EXTERNAL TEETH; Material Document and Classification: QQ-N-281, CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Material Thickness: 0.062 INCHES NOMINAL IN; Special Features: INSIDE DIA. HAS TWO HOLES. 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.