The Washer,lock, cataloged under National Stock Number 5310-00-005-7239, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lehigh Armstrong Inc. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-005-7239 |
| Primary Part Number | N407P3 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lehigh Armstrong Inc |
| Status | ACTIVE |
| Hardness Rating | 90.0 ROCKWELL B NOMINAL |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.165 INCHES MAXIMUM IN |
| Material Thickness | 0.015 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.088 INCHES MINIMUM AND 0.097 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 |
|---|---|
| N407P3 PRIMARY | Lehigh Armstrong Inc (USA) |
| Reference | Meaning |
|---|---|
| N407P3 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-005-7239 is a Washer,lock, manufactured by Lehigh Armstrong Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-005-7239 has 1 manufacturer part number on file: N407P3 (Lehigh Armstrong Inc).
Key specifications for N407P3: Hardness Rating: 90.0 ROCKWELL B NOMINAL; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.165 INCHES MAXIMUM IN; Material Thickness: 0.015 INCHES MINIMUM AND 0.021 INCHES MAXIMUM 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.