The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-00-079-1242, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Martin-Baker Aircraft Company Limited. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-079-1242 |
| Primary Part Number | MBEU25889 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Shoulder Height | 0.043 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | S.520,FSCM K0195 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.500 INCHES NOMINAL IN |
| Material Thickness | 0.022 INCHES NOMINAL IN |
| Shoulder Diameter | 0.400 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.285 INCHES NOMINAL IN |
| Recess Angle | 90.0 DEGREES NOMINAL |
| 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 |
|---|---|
| MBEU25889 PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
NSN 5310-00-079-1242 is a Washer,shouldered and Recessed, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-079-1242 has 1 manufacturer part number on file: MBEU25889 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU25889: Shoulder Height: 0.043 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED; Material Document and Classification: S.520,FSCM K0195 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.500 INCHES NOMINAL IN. 9 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.