The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-901-3934, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-901-3934 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Washer Outside Diameter | 0.512 INCHES MAXIMUM IN |
| Width Across Flats | 0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 1400.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | AMS 5756 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.090 INCHES MINIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Specification/standard Data | 80205-NAS1287 GOVERNMENT STANDARD |
| Counterbore Diameter | 0.317 INCHES MINIMUM NUT IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | EXTERNAL SURFACE SILVER |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY M252 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 |
|---|---|
| LH4079-054 | 5/9 Secondary reference Harvard Industries Inc |
| NAS1287C5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-901-3934 is a Nut,self-Locking,extended Washer, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-901-3934: Overall Height: 0.320 INCHES MAXIMUM IN; Washer Outside Diameter: 0.512 INCHES MAXIMUM IN; Width Across Flats: 0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 18 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.