The Washer,lock, cataloged under National Stock Number 5310-01-024-3026, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-024-3026 |
| Primary Part Number | 4912551-02 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | FLAT EXTERNAL TEETH |
| Outside Diameter | 0.365 INCHES MINIMUM AND 0.365 INCHES MINIMUM AND 0.381 INCHES MAXIMUM0.381 INCHES MAXIMUM IN |
| Material Thickness | 0.018 INCHES MINIMUM AND 0.018 INCHES MINIMUM AND 0.023 INCHES MAXIMUM0.023 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.168 INCHES MINIMUM AND 0.168 INCHES MINIMUM AND 0.176 INCHES MAXIMUM0.176 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 |
|---|---|
| 4912551-02 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 4912551-02 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-024-3026 is a Washer,lock, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-024-3026 has 1 manufacturer part number on file: 4912551-02 (Northrop Grumman Systems Corporation).
Key specifications for 4912551-02: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: FLAT EXTERNAL TEETH; Outside Diameter: 0.365 INCHES MINIMUM AND 0.365 INCHES MINIMUM AND 0.381 INCHES MAXIMUM0.381 INCHES MAXIMUM IN; Material Thickness: 0.018 INCHES MINIMUM AND 0.018 INCHES MINIMUM AND 0.023 INCHES MAXIMUM0.023 INCHES MAXIMUM IN. 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.