The Washer,lock, cataloged under National Stock Number 5310-01-068-8403, 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 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-068-8403 |
| Primary Part Number | 1802768 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | QQ-N-281 CL A FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.355 INCHES MAXIMUM0.355 INCHES MAXIMUM IN |
| Material Thickness | 0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN |
| Material | NICKEL ALLOY AND COPPER ALLOY OVERALL |
| Hole Diameter | 0.255 INCHES NOMINAL0.255 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-068-8403 is a Washer,lock, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-068-8403 has 2 manufacturer part numbers on file: 1802768 (Allmetal Screw Products Corp), 1802768 (Northrop Grumman Systems Corporation).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-459-6125. Verify interchangeability with system specifications before substitution.
Key specifications for 1802768: Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: QQ-N-281 CL A FED SPEC ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 0.355 INCHES MAXIMUM0.355 INCHES MAXIMUM IN; Material Thickness: 0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN. 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.