The Washer,lock, cataloged under National Stock Number 5310-01-509-6819, 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 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-509-6819 |
| Primary Part Number | 6390821-14 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | MIL-T-4907,CP-2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.036 INCHES NOMINAL IN |
| Material Thickness | 0.312 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | TITANIUM ALLOY OVERALL |
| Hole Diameter | 1.254 INCHES MINIMUM AND 1.280 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 |
|---|---|
| 6390821-14 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| 6390821-14 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-509-6819 is a Washer,lock, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-509-6819 has 2 manufacturer part numbers on file: 6390821-14 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 6390821-14 (Naval Sea Systems Command).
Key specifications for 6390821-14: Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: MIL-T-4907,CP-2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 2.036 INCHES NOMINAL IN; Material Thickness: 0.312 INCHES NOMINAL 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.