The O-Ring, cataloged under National Stock Number 5331-01-263-5991, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-263-5991 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| MS28775-252 | 5/9 Secondary reference U.S. Government activity |
| MS28775-252 | 5/9 Secondary reference Sae International Dba Sae International |
| D1976 PC.22 | 5/9 Secondary reference P J Valves Inc |
| MS28775-252 | 5/9 Secondary reference U.S. Government activity |
| D1976PC22,3IN | 5/9 Secondary reference P J Valves Inc |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5331-01-263-5991 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
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.