The Valve,check, cataloged under National Stock Number 4820-01-223-8642, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Walworth Company. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-223-8642 |
| Primary Part Number | 1 1/2IN FIG-W412 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 1 1/2IN FIG-W412 PRIMARY | The Walworth Company (USA) |
| FIG-3412X40MM | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| 11/2IN FIG-3412 | 5/9 Secondary reference The Walworth Company |
NSN 4820-01-223-8642 is a Valve,check, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-223-8642 has 2 manufacturer part numbers on file: 1 1/2IN FIG-W412 (The Walworth Company), FIG-3412X40MM (The Walworth Company).
Key specifications for 1 1/2IN FIG-W412: Flow Control Device: DISK; Special Features: VALVE SIZE 1-1/2 INCH IN; Material: COPPER ALLOY BODY. 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.