The Disk,valve, cataloged under National Stock Number 4820-01-433-9889, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dante Valve Company. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-433-9889 |
| Primary Part Number | D50FF-4-05-A |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dante Valve Company |
| Status | ACTIVE |
| Pressure Rating | 250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 150.0 FAHRENHEIT NOMINAL DEGF |
| Style Designator | POPPET |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| D50FF-4-00 ITEM 5 | Dante Valve Company (USA) |
| D50FF-4-05-A PRIMARY | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| D50FF-4-00 ITEM 5 | 5/9 Secondary reference Danco Valve Company |
| D50FF-4-00 REV A | D/9 Drawing number reference only Danco Valve Company |
| D50FF-4-05-A | 3/9 Design control — primary reference Danco Valve Company |
NSN 4820-01-433-9889 is a Disk,valve, manufactured by Dante Valve Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-433-9889 has 2 manufacturer part numbers on file: D50FF-4-00 ITEM 5 (Dante Valve Company), D50FF-4-05-A (Dante Valve Company).
Key specifications for D50FF-4-05-A: Pressure Rating: 250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: 150.0 FAHRENHEIT NOMINAL DEGF; Style Designator: POPPET; Special Features: FOR VALVE ANGLE RELIEF FLANGED D50FF-5X5. 4 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.