The O-Ring, cataloged under National Stock Number 5331-01-123-3529, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Pentair Filtration Solutions, Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Pentair Filtration Solutions, Llc (CAGE 08576) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-123-3529 |
| Primary Part Number | 873-90 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Pentair Filtration Solutions, Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| 873-90 PRIMARY | Pentair Filtration Solutions, Llc (USA) |
| Reference | Meaning |
|---|---|
| 0873-90 | 5/9 Secondary reference Pentair Filtration Solutions, Llc |
| 8013-559N | 5/9 Secondary reference Minnesota Rubber Co |
NSN 5331-01-123-3529 is a O-Ring, manufactured by Pentair Filtration Solutions, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-123-3529 has 1 manufacturer part number on file: 873-90 (Pentair Filtration Solutions, Llc).
1 possible match (shared part number, not a government interchangeability claim): 2930-01-408-7241. Verify interchangeability with system specifications before substitution.
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.