The Nut,self-Locking,assembled Washe, cataloged under National Stock Number 5310-01-139-3286, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cnim Systemes Industriels. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-139-3286 |
| Primary Part Number | 1AO2I0048H |
| Item Name | Nut,self-Locking,assembled Washe |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cnim Systemes Industriels |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Washer Outside Diameter | 0.460 INCHES MAXIMUM IN |
| Width Across Flats | 0.274 INCHES MINIMUM AND 0.284 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| Nut Counterbore Depth | 0.072 INCHES MINIMUM AND 0.087 INCHES MAXIMUM OVERALL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Specification/standard Data | 80205-NAS1726 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | FLAT WITH TURNED UP EDGE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OVERALL |
| 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 |
|---|---|
| 1AO2I0048H | Cnim Systemes Industriels (FRA) |
| Reference | Meaning |
|---|---|
| NAS1726-4E | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-139-3286 is a Nut,self-Locking,assembled Washe, manufactured by Cnim Systemes Industriels, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-139-3286 has 1 manufacturer part number on file: 1AO2I0048H (Cnim Systemes Industriels).
Key specifications for 1AO2I0048H: Lubrication: SOLUBLE LUBRICANT; Overall Height: 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN; Washer Outside Diameter: 0.460 INCHES MAXIMUM IN; Width Across Flats: 0.274 INCHES MINIMUM AND 0.284 INCHES MAXIMUM IN. 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.