The Disk,valve, cataloged under National Stock Number 4820-00-073-9889, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company Inc Dba Union Flonetics. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-073-9889 |
| Primary Part Number | D50668 ITEM 8 ASSY A47419 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company Inc Dba Union Flonetics |
| Status | ACTIVE |
| Shank Diameter | 0.250 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.718 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Tip Diameter | 0.172 INCHES NOMINAL IN |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Under Flange Height | 2.141 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| D50668 ITEM 8 ASSY A47419 PRIMARY | Hunt Valve Company Inc Dba Union Flonetics (USA) |
| A47419 PRIMARY | Hunt Valve Company Inc Dba Union Flonetics (USA) |
| Reference | Meaning |
|---|---|
| A47419 | 5/9 Secondary reference Hammel Dahl Inc |
NSN 4820-00-073-9889 is a Disk,valve, manufactured by Hunt Valve Company Inc Dba Union Flonetics, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-073-9889 has 2 manufacturer part numbers on file: D50668 ITEM 8 ASSY A47419 (Hunt Valve Company Inc Dba Union Flonetics), A47419 (Hunt Valve Company Inc Dba Union Flonetics).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-485-1226. Verify interchangeability with system specifications before substitution.
Key specifications for D50668 ITEM 8 ASSY A47419: Shank Diameter: 0.250 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.718 INCHES NOMINAL IN; Overall Height: 2.938 INCHES NOMINAL IN; Style Designator: POPPET. 7 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.