The O-Ring, cataloged under National Stock Number 5331-01-665-7181, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Asd-Stan. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-665-7181 |
| Primary Part Number | EN6075-241 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Asd-Stan |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Center Hole Diameter | 3.844 INCHES MINIMUM AND 3.874 INCHES MAXIMUM IN |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM |
| 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 |
|---|---|
| EN6075-241 | Asd-Stan (BEL) |
| Reference | Meaning |
|---|---|
| NAS1613 | 3/1 Design control — primary reference U.S. Government activity |
| NAS1611-241A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-665-7181 is a O-Ring, manufactured by Asd-Stan, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-665-7181 has 1 manufacturer part number on file: EN6075-241 (Asd-Stan).
Key specifications for EN6075-241: Temp Rating: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Special Features: PREFORMED O-RING PHOSPHATE ESTER RESISTANT -65F TO 250/300; Center Hole Diameter: 3.844 INCHES MINIMUM AND 3.874 INCHES MAXIMUM IN. 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.