The Washer,lock, cataloged under National Stock Number 5310-00-167-0658, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-167-0658 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.280 INCHES NOMINAL IN |
| Material Thickness | 0.0312 INCHES MINIMUM AND 0.0372 INCHES MAXIMUM IN |
| Departure From Cited Designator | AS MODIFIED BY MATERIAL SPEC |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.168 INCHES MINIMUM AND 0.178 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 |
| Reference | Meaning |
|---|---|
| 20500-19 | 5/1 Secondary reference Honeywell International, Inc Div Aerospace-Tucson |
| AN935B8L | 2/2 Government specification standardization U.S. Government activity |
| 20500-19 | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems |
| 900873-06 | 5/2 Secondary reference U.S. Government activity |
| AN935B8L | 5/1 Secondary reference U.S. Government activity |
| 20500-19 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-167-0658 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5995-01-249-8670. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-167-0658: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.280 INCHES NOMINAL IN; Material Thickness: 0.0312 INCHES MINIMUM AND 0.0372 INCHES MAXIMUM IN; Departure From Cited Designator: AS MODIFIED BY MATERIAL SPEC. 7 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.