The Disk,valve, cataloged under National Stock Number 4820-01-270-4201, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Flow Control Corporation Dba Sprague Products Div Curtiss-Wright Flow Controls. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Disk,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Curtiss-Wright Flow Control Corporation Dba Sprague Products Div Curtiss-Wright Flow Controls (CAGE 1STQ3) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-270-4201 |
| Primary Part Number | 79420-3 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Flow Control Corporation Dba Sprague Products Div Curtiss-Wright Flow Controls |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 79420-3 PRIMARY | Curtiss-Wright Flow Control Corporation Dba Sprague Products Div Curtiss-Wright Flow Controls (USA) |
| Reference | Meaning |
|---|---|
| 79420-3 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-270-4201 is a Disk,valve, manufactured by Curtiss-Wright Flow Control Corporation Dba Sprague Products Div Curtiss-Wright Flow Controls, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-270-4201 has 1 manufacturer part number on file: 79420-3 (Curtiss-Wright Flow Control Corporation Dba Sprague Products Div Curtiss-Wright Flow Controls).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-324-0030. Verify interchangeability with system specifications before substitution.
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.