The O-Ring, cataloged under National Stock Number 5331-01-138-0788, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is James Walker & Co Ltd. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-138-0788 |
| Primary Part Number | MBEU-65959 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | James Walker & Co Ltd |
| Status | ACTIVE |
| Cross-Sectional Height | 0.103 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| MBEU-65959 | James Walker & Co Ltd (GBR) |
| MBEU-65959 | Martin-Baker Aircraft Company Limited (GBR) |
| MBEU-65959 | Martin-Baker America, Inc (USA) |
| Reference | Meaning |
|---|---|
| MBEU-65959 | 3/9 Design control — primary reference Lucas Aerospace Ltd (electronic Systems & Equipment Div) |
NSN 5331-01-138-0788 is a O-Ring, manufactured by James Walker & Co Ltd, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-138-0788 has 3 manufacturer part numbers on file: MBEU-65959 (James Walker & Co Ltd), MBEU-65959 (Martin-Baker Aircraft Company Limited), MBEU-65959 (Martin-Baker America, Inc).
Key specifications for MBEU-65959: Cross-Sectional Height: 0.103 INCHES NOMINAL IN. 1 specification is 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.