The O-Ring, cataloged under National Stock Number 5331-01-125-8287, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Goodrich Actuation Systems Ltd. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-125-8287 |
| Primary Part Number | MBEU-66957 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Goodrich Actuation Systems Ltd |
| Status | ACTIVE |
| Cross-Sectional Height | 0.042 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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-66957 | Martin-Baker Aircraft Company Limited (GBR) |
| MBEU-66957 PRIMARY | Goodrich Actuation Systems Ltd (GBR) |
| MBEU-66957 | James Walker & Co Ltd (GBR) |
| Reference | Meaning |
|---|---|
| MBEU-66957 | 3/9 Design control — primary reference Lucas Aerospace Ltd (electronic Systems & Equipment Div) |
NSN 5331-01-125-8287 is a O-Ring, manufactured by Goodrich Actuation Systems Ltd, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-125-8287 has 3 manufacturer part numbers on file: MBEU-66957 (Martin-Baker Aircraft Company Limited), MBEU-66957 (Goodrich Actuation Systems Ltd), MBEU-66957 (James Walker & Co Ltd).
Key specifications for MBEU-66957: Cross-Sectional Height: 0.042 INCHES NOMINAL IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.