The Washer,lock, cataloged under National Stock Number 5310-00-565-6771, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-565-6771 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | F70C1A FSCM 09172 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 90.0 ROCKWELL B MINIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | C4B1 FSCM 30221 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.489 INCHES NOMINAL IN |
| Material Thickness | 0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.267 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 |
|---|---|
| N407P11C | 3/9 Design control — primary reference General Electric Co Materials Information Services |
NSN 5310-00-565-6771 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-565-6771: Surface Treatment Document and Classification: F70C1A FSCM 09172 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 90.0 ROCKWELL B MINIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: C4B1 FSCM 30221 MFR REF SINGLE MATERIAL RESPONSE OVERALL. 9 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.