The O-Ring, cataloged under National Stock Number 5331-00-057-2091, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Grove Valve Operations. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-00-057-2091 |
| Primary Part Number | 0XN95-81621 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Grove Valve Operations |
| Status | ACTIVE |
| Temp Rating | 160.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Hardness Rating | 65.0 SHORE DUROMETER A MINIMUM AND 71.0 SHORE DUROMETER A MAXIMUM |
| Criticality Code Justification | FEAT |
| Center Hole Diameter | 1.358 INCHES MINIMUM AND 1.370 INCHES MAXIMUM IN |
| Material | RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| N95-81621CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 0XN95-81621CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 0XN95-81621 PRIMARY | Grove Valve Operations (USA) |
| Reference | Meaning |
|---|---|
| N95-81621 | 5/1 Secondary reference Grove Valve Operations |
NSN 5331-00-057-2091 is a O-Ring, manufactured by Grove Valve Operations, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-057-2091 has 3 manufacturer part numbers on file: N95-81621CP (Naval Inventory Control Point Mechanicsburg), 0XN95-81621CP (Naval Inventory Control Point Mechanicsburg), 0XN95-81621 (Grove Valve Operations).
Key specifications for 0XN95-81621: Temp Rating: 160.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Hardness Rating: 65.0 SHORE DUROMETER A MINIMUM AND 71.0 SHORE DUROMETER A MAXIMUM; Criticality Code Justification: FEAT. 6 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.