The O-Ring, cataloged under National Stock Number 5331-01-364-7188, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 4 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-364-7188 |
| Primary Part Number | MBEU146475 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE NOMINAL |
| Center Hole Diameter | 2.021 INCHES MINIMUM AND 2.041 INCHES MAXIMUM 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 |
|---|---|
| MBEU146475 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| MBEU146475 | Martin-Baker Aircraft Company Limited (GBR) |
NSN 5331-01-364-7188 is a O-Ring, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-364-7188 has 2 manufacturer part numbers on file: MBEU146475 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), MBEU146475 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU146475: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN; Hardness Rating: 70.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE NOMINAL; Center Hole Diameter: 2.021 INCHES MINIMUM AND 2.041 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 4 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.