The Valve,check, cataloged under National Stock Number 4820-01-459-1449, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cosmodyne, Llc Dba Cosmodyne Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Cosmodyne, Llc Dba Cosmodyne Llc (CAGE 11243) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-459-1449 |
| Primary Part Number | 2603504-1CP |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cosmodyne, Llc Dba Cosmodyne 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 |
|---|---|
| 2603504-1CP PRIMARY | Cosmodyne, Llc Dba Cosmodyne Llc (USA) |
| Reference | Meaning |
|---|---|
| 2603504-1CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2603504 | D/9 Drawing number reference only Cosmodyne, Llc Dba Cosmodyne Llc |
| 560Y 1-1/2 IN. | 5/1 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 2603504-1 | 3/1 Design control — primary reference Cosmodyne, Llc Dba Cosmodyne Llc |
NSN 4820-01-459-1449 is a Valve,check, manufactured by Cosmodyne, Llc Dba Cosmodyne Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-459-1449 has 1 manufacturer part number on file: 2603504-1CP (Cosmodyne, Llc Dba Cosmodyne Llc).
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.