The Ring,piston, cataloged under National Stock Number 2805-01-264-5597, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Parker-Hannifin Corp Div Cylinder Division, Custom Cylinder Operations. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Ring,piston |
| FSC / FSG | 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components (FSG 28) |
| Manufacturers | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control (CAGE 12190); Parker-Hannifin Corp Div Cylinder Division, Custom Cylinder Operations (CAGE 25561) |
| Parameter | Value |
|---|---|
| NSN | 2805-01-264-5597 |
| Primary Part Number | 58444510 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Parker-Hannifin Corp Div Cylinder Division, Custom Cylinder Operations |
| 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 |
|---|---|
| PF41037-19 | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control (USA) |
| 58444510 PRIMARY | Parker-Hannifin Corp Div Cylinder Division, Custom Cylinder Operations (USA) |
| Reference | Meaning |
|---|---|
| P-84445-19 | 5/9 Secondary reference Parker-Hannifin Corp Div Cylinder Division, Custom Cylinder Operations |
| PF41037 | D/9 Drawing number reference only Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control |
NSN 2805-01-264-5597 is a Ring,piston, manufactured by Parker-Hannifin Corp Div Cylinder Division, Custom Cylinder Operations, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-01-264-5597 has 2 manufacturer part numbers on file: PF41037-19 (Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control), 58444510 (Parker-Hannifin Corp Div Cylinder Division, Custom Cylinder Operations).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-330-5248. 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.