The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-663-0722, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bell Boeing Joint Project Office. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-663-0722 |
| Primary Part Number | NAS9926-8L |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bell Boeing Joint Project Office |
| Status | ACTIVE |
| Washer Outside Diameter | 0.788 INCHES MINIMUM IN |
| Width Across Flats | 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416, TYPE II, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.085 INCHES MINIMUM IN |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5853 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.5000 INCHES IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| NAS9926-8L | Leonardo Spa Helicopters Division - Production Site (ITA) |
| NAS9926-8L PRIMARY | Bell Boeing Joint Project Office (USA) |
| Reference | Meaning |
|---|---|
| NAS9926-8L | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-663-0722 is a Nut,self-Locking,extended Washer, manufactured by Bell Boeing Joint Project Office, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-663-0722 has 2 manufacturer part numbers on file: NAS9926-8L (Leonardo Spa Helicopters Division - Production Site), NAS9926-8L (Bell Boeing Joint Project Office).
Key specifications for NAS9926-8L: Overall Height: 0.350 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN; Washer Outside Diameter: 0.788 INCHES MINIMUM IN; Width Across Flats: 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-416, TYPE II, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 14 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.