The O-Ring, cataloged under National Stock Number 5331-01-528-6356, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-528-6356 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Cross-Sectional Height | 0.271 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Hardness Rating | 90.0 SHORE DUROMETER A NOMINAL |
| Criticality Code Justification | ZZZY |
| Center Hole Diameter | 5.188 INCHES MINIMUM AND 5.262 INCHES MAXIMUM IN |
| Material | RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| SAE-AS3581 | 5/1 Secondary reference Sae International Dba Sae International |
| AMS7259 | 5/1 Secondary reference Sae International Dba Sae International |
| 211037621CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| AS3581-431CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| CD-023-35-11CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| AMS7259 | 5/9 Secondary reference U.S. Government activity |
| AS3581-431CP | 5/9 Secondary reference U.S. Government activity |
| 8016404589 FIND 11CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| AS3581-431CP | 3/1 Design control — primary reference Sae International Dba Sae International |
| M83248/2-431CP | C/1 Advisory reference — outside the item-of-supply concept Naval Inventory Control Point Mechanicsburg |
| DF330618 FIND 11CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 5331-01-528-6356 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
Key specifications for 5331-01-528-6356: Cross-Sectional Height: 0.271 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL; Criticality Code Justification: ZZZY; Center Hole Diameter: 5.188 INCHES MINIMUM AND 5.262 INCHES MAXIMUM IN. 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.