The Valve,plug, cataloged under National Stock Number 4820-01-504-3945, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cunico Corporation. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Valve,plug |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Cunico Corporation (CAGE 53424) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-504-3945 |
| Primary Part Number | CFV-20543-002 ITEM 006,007 |
| Item Name | Valve,plug |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cunico Corporation |
| Status | ACTIVE |
| 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 |
|---|---|
| ACX-4809/CFV-20543-002 IT 6,7 | Cunico Corporation (USA) |
| CFV-20543-002 ITEM 006,007 PRIMARY | Cunico Corporation (USA) |
| Reference | Meaning |
|---|---|
| CFV-20543-002 | D/9 Drawing number reference only Cunico Corporation |
| ACX-4809 | D/9 Drawing number reference only Cunico Corporation |
NSN 4820-01-504-3945 is a Valve,plug, manufactured by Cunico Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-504-3945 has 2 manufacturer part numbers on file: ACX-4809/CFV-20543-002 IT 6,7 (Cunico Corporation), CFV-20543-002 ITEM 006,007 (Cunico Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-504-3947. 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.