The Washer,lock, cataloged under National Stock Number 5310-01-201-2644, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-201-2644 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASCO MP-PL-009,PROCESS II MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | NICKEL OVERALL |
| Material | COPPER ALLOY 511 OVERALL |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| AV-216-832 ITEM 19 | 5/1 Secondary reference Automatic Switch Company Dba Asco |
| GV45-291-12-A2 | 3/1 Design control — primary reference Automatic Switch Company Dba Asco |
NSN 5310-01-201-2644 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-201-2644: Surface Treatment Document and Classification: ASCO MP-PL-009,PROCESS II MFR REF SINGLE TREATMENT RESPONSE OVERALL; Criticality Code Justification: ZZZY; Material Document and Classification: QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment: NICKEL OVERALL. 6 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.