The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-042-5576, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Aerospace Limited. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-042-5576 |
| Primary Part Number | DSR4703-1005 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meggitt Aerospace Limited |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.750 INCHES MAXIMUM IN |
| Width Across Flats | 0.554 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2401-3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Hardness Rating | 45.0 ROCKWELL C MAXIMUM |
| Washer Thickness | 0.075 INCHES MINIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP H11 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 |
|---|---|
| DSR4703-1005 | Meggitt Aerospace Limited (GBR) |
| Reference | Meaning |
|---|---|
| NAS1758L7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-042-5576 is a Nut,self-Locking,extended Washer, manufactured by Meggitt Aerospace Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-042-5576 has 1 manufacturer part number on file: DSR4703-1005 (Meggitt Aerospace Limited).
Key specifications for DSR4703-1005: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.520 INCHES MAXIMUM IN; Washer Outside Diameter: 0.750 INCHES MAXIMUM IN; Width Across Flats: 0.554 INCHES MINIMUM AND 0.564 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.