The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-660-6736, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Aeronautics Division - Pomigliano D'arco Site. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-660-6736 |
| Primary Part Number | MS14144-5 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site |
| Status | ACTIVE |
| Washer Outside Diameter | 0.4820 INCHES MINIMUM IN |
| Width Across Flats | 0.3670 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0000 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.0550 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.3125 INCHES IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | CASTELLATED HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| MS14144-5 | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| Reference | Meaning |
|---|---|
| MS14144-5 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-01-660-6736 is a Nut,self-Locking,extended Washer, manufactured by Leonardo Spa Aeronautics Division - Pomigliano D'arco Site, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-660-6736 has 1 manufacturer part number on file: MS14144-5 (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site).
Key specifications for MS14144-5: Overall Height: 0.3130 INCHES MINIMUM AND 0.3430 INCHES MAXIMUM IN; Washer Outside Diameter: 0.4820 INCHES MINIMUM IN; Width Across Flats: 0.3670 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-416 FED SPEC 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.