The O-Ring, cataloged under National Stock Number 5331-01-069-1561, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Fluid Mechanics Valve Company. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | Fluid Mechanics Valve Company (CAGE 52253); Cosmodyne, Llc Dba Cosmodyne Llc (CAGE 11243) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-069-1561 |
| Primary Part Number | 2-1198-4-38 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Fluid Mechanics Valve Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 2-1198-4-38 PRIMARY | Fluid Mechanics Valve Company (USA) |
| 2601289-23 | Cosmodyne, Llc Dba Cosmodyne Llc (USA) |
NSN 5331-01-069-1561 is a O-Ring, manufactured by Fluid Mechanics Valve Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-069-1561 has 2 manufacturer part numbers on file: 2-1198-4-38 (Fluid Mechanics Valve Company), 2601289-23 (Cosmodyne, Llc Dba Cosmodyne Llc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-197-9900. 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.