The Washer,lock, cataloged under National Stock Number 5310-01-362-0361, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-362-0361 |
| Primary Part Number | 12539C18 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.413 INCHES NOMINAL IN |
| Material Thickness | 0.040 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Material | STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OVERALL |
| Hole Diameter | 0.253 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 |
| Part Number | Manufacturer |
|---|---|
| 12539C18 | Argo Turboserve Corporation Div Argo Turboserve Corp. (USA) |
| 12539C18 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 12539C18 | 5/9 Secondary reference U.S. Government activity |
| 12539C18B | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Div Epd |
NSN 5310-01-362-0361 is a Washer,lock, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-362-0361 has 2 manufacturer part numbers on file: 12539C18 (Argo Turboserve Corporation Div Argo Turboserve Corp.), 12539C18 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 12539C18: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.413 INCHES NOMINAL IN; Material Thickness: 0.040 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Material: STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OVERALL. 5 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.