The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-326-3458, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Paolo Astori Spa. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-326-3458 |
| Primary Part Number | NAS1805-18 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Paolo Astori Spa |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 1.822 INCHES MAXIMUM IN |
| Width Across Flats | 1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.150 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5737 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5662 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.125 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 | 12 |
| Material | IRON ALLOY 660 OR NICKEL ALLOY 718 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| NAS1805-18 | Paolo Astori Spa (ITA) |
| Reference | Meaning |
|---|---|
| NAS1805-18 | 3/9 Design control — primary reference U.S. Government activity |
| 109LH8574A-18 | 5/9 Secondary reference Harvard Industries Inc |
| 109LH8574A-18 | 5/9 Secondary reference Esna, Llc |
NSN 5310-01-326-3458 is a Nut,self-Locking,extended Washer, manufactured by Paolo Astori Spa, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-326-3458 has 1 manufacturer part number on file: NAS1805-18 (Paolo Astori Spa).
Key specifications for NAS1805-18: Lubrication: DRY FILM LUBRICANT; Overall Height: 1.125 INCHES MAXIMUM IN; Washer Outside Diameter: 1.822 INCHES MAXIMUM IN; Width Across Flats: 1.364 INCHES MINIMUM AND 1.377 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.