NSN 4820-01-504-7831 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-504-7831. Manufacturer of record part number: 578-43S6BKB-320.
The Valve,flow Control, cataloged under National Stock Number 4820-01-504-7831, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Carver Pump Company. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-504-7831
Primary Part Number
578-43S6BKB-320
Item Name
Valve,flow Control
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Carver Pump Company
Status
ACTIVE
End Connection Quantity
2
Body Material
NICKEL ALLOY
Valve Operation Method
MANUAL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-504-7834580-014-250POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Carver Pump Company
4820-01-504-7881250-1100002POSSIBLE MATCH
VALVE ASSEMBLY
Possible match (shared part number)Carver Pump Company
4720-01-504-8512499-0916-02POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Carver Pump Company
4730-01-504-8514535-916-01-327POSSIBLE MATCH
ADAPTER,STRAIGHT,PIPE TO GAS FIT
Possible match (shared part number)Carver Pump Company
4730-01-504-8570533-00-0007-320POSSIBLE MATCH
COUPLING,TUBE
Possible match (shared part number)Carver Pump Company
NSN 4820-01-504-7831 is a Valve,flow Control, manufactured by Carver Pump Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-504-7831?
NSN 4820-01-504-7831 has 2 manufacturer part numbers on file: 250-1100-0-02 REV 3 ITEM 4 (Carver Pump Company), 578-43S6BKB-320 (Carver Pump Company).
What NSN replaces 4820-01-504-7831?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-504-7834, 4820-01-504-7881, 4720-01-504-8512. Verify interchangeability with system specifications before substitution.
What are the specifications of 578-43S6BKB-320?
Key specifications for 578-43S6BKB-320: End Connection Quantity: 2; Body Material: NICKEL ALLOY; Special Features: NHA VALVE ASSY PUMP; Valve Operation Method: MANUAL. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-504-7831 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.