The Nut,self-Locking,barrel, cataloged under National Stock Number 5310-01-203-6559, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Raytheon Company. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-203-6559 |
| Primary Part Number | 7685-65975-002 |
| Item Name | Nut,self-Locking,barrel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Bearing Surface Finish | 100.0 MICROINCHES |
| Nut Length | 0.688 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Nut Diameter | 0.528 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.468 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | FLOATING SELF-LOCKING BARREL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| Barrel Height | 0.360 INCHES NOMINAL IN |
| 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 |
|---|---|
| 7944M-524 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| F1801-5 | Howmet Global Fastening Systems Inc (USA) |
| B12669-5 | Esna, Llc (USA) |
| 7685-65975-002 PRIMARY | Raytheon Company (USA) |
| Reference | Meaning |
|---|---|
| B12669-5 | 5/9 Secondary reference Harvard Industries Inc |
| 7685-65975-002 | 5/9 Secondary reference Hughes Missile Systems Co San Diego |
| SL4O56-5 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-203-6559 is a Nut,self-Locking,barrel, manufactured by Raytheon Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-203-6559 has 4 manufacturer part numbers on file: 7944M-524 (Sps Technologies, Llc Dba PB Fasteners), F1801-5 (Howmet Global Fastening Systems Inc), B12669-5 (Esna, Llc), 7685-65975-002 (Raytheon Company).
Key specifications for 7685-65975-002: Lubrication: DRY FILM LUBRICANT; Bearing Surface Finish: 100.0 MICROINCHES; Nut Length: 0.688 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 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.