The Valve,check, cataloged under National Stock Number 4820-01-449-5544, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-449-5544 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU DROP-IN CARTRIDGE |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| FF3675A | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division |
| FF3675A | 3/9 Design control — primary reference Parker Hannifin Corporation Div Hydraulic Filter Division, Fairey Arlon Operations |
NSN 4820-01-449-5544 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-449-5544: Style Designator: STRAIGHT THRU DROP-IN CARTRIDGE; Special Features: BUNA-N SEAL; End Item Identification: USNS STALWART CLASS TAGOS; Valve Operation Method: AUTOMATIC. 2 specifications are documented in the U.S. Government catalog.
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.