The O-Ring, cataloged under National Stock Number 5331-01-143-1778, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Martin-Baker Aircraft Company Limited. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-143-1778 |
| Primary Part Number | MBEU-66461 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Cross-Sectional Height | 0.103 INCHES NOMINAL IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| 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 |
|---|---|
| MBEU-66461 | Martin-Baker Aircraft Company Limited (GBR) |
| MBEU-66461 | Goodrich Actuation Systems Ltd (GBR) |
| Reference | Meaning |
|---|---|
| MBEU-66461 | 3/9 Design control — primary reference Lucas Aerospace Ltd (electronic Systems & Equipment Div) |
NSN 5331-01-143-1778 is a O-Ring, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-143-1778 has 2 manufacturer part numbers on file: MBEU-66461 (Martin-Baker Aircraft Company Limited), MBEU-66461 (Goodrich Actuation Systems Ltd).
Key specifications for MBEU-66461: Cross-Sectional Height: 0.103 INCHES NOMINAL IN; Material: RUBBER FLUOROSILICONE CLASS FQ. 2 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.