The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-237-1039, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-237-1039 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Washer Outside Diameter | 1.418 INCHES MAXIMUM IN |
| Width Across Flats | 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MINIMUM AND 800.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.094 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.7500 INCHES IN |
| Specification/standard Data | 80205-NAS1805 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| Material | IRON ALLOY 660 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| NAS1805-12 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-237-1039 is a Nut,self-Locking,extended Washer, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-237-1039: Lubrication: SOLUBLE LUBRICANT; Overall Height: 0.750 INCHES MAXIMUM IN; Washer Outside Diameter: 1.418 INCHES MAXIMUM IN; Width Across Flats: 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN. 17 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.