The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-135-2885, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-135-2885 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Washer Outside Diameter | 0.708 INCHES MAXIMUM IN |
| Width Across Flats | 0.494 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,CL FED SPEC SINGLE TREATMENT RESPONSE OR 2 FED STD 9TH TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.035 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Specification/standard Data | 80205-NAS1291 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Countersink Angle | 120.0 DEGREES MAXIMUM OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL 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 |
|---|---|
| NAS1291X7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-135-2885 is a Nut,self-Locking,extended Washer, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-135-2885: Overall Height: 0.313 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Washer Outside Diameter: 0.708 INCHES MAXIMUM IN; Width Across Flats: 0.494 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,CL FED SPEC SINGLE TREATMENT RESPONSE OR 2 FED STD 9TH TREATMENT RESPONSE OVERALL. 16 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.