The Valve,butterfly, cataloged under National Stock Number 4820-01-354-2571, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-354-2571
Item Name
Valve,butterfly
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
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 Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4810-01-354-2572804-1749103C K40 W/115V OPERPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Naval Ship Systems Command
4810-01-354-2573804-1749103C K41 W/115V OPERPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Naval Ship Systems Command
4820-01-354-2576804-1749103C K35 W/WORM GEARPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Naval Ship Systems Command
4810-01-354-2577804-1749103C K36 W/115V OPERPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Naval Ship Systems Command
4810-01-354-2578804-1749103C K39 W/115V OPERPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Naval Ship Systems Command
4820-01-354-2579804-1749103C K34 W/WORM GEARPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Naval Ship Systems Command
4820-01-354-2580804-1749103C K37 W/WORM GEARPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Naval Ship Systems Command
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
804-1749103C
5/1Secondary reference
U.S. Government activity
GENERIC HEAD,DO NOT ORDER
3/1Design control — primary reference
Naval Inventory Control Point Mechanicsburg
804-1749103C K36 W/WORM GEAR
3/2Design control — primary reference
U.S. Government activity
Related Parts
4810-01-354-2572POSSIBLE MATCH
VALVE,BUTTERFLY
804-1749103C K40 W/115V OPER
4810-01-354-2573POSSIBLE MATCH
VALVE,BUTTERFLY
804-1749103C K41 W/115V OPER
4820-01-354-2576POSSIBLE MATCH
VALVE,BUTTERFLY
804-1749103C K35 W/WORM GEAR
4810-01-354-2577POSSIBLE MATCH
VALVE,BUTTERFLY
804-1749103C K36 W/115V OPER
4810-01-354-2578POSSIBLE MATCH
VALVE,BUTTERFLY
804-1749103C K39 W/115V OPER
4820-01-354-2579POSSIBLE MATCH
VALVE,BUTTERFLY
804-1749103C K34 W/WORM GEAR
4820-01-354-2580POSSIBLE MATCH
VALVE,BUTTERFLY
804-1749103C K37 W/WORM GEAR
Frequently Asked Questions
What is NSN 4820-01-354-2571?
NSN 4820-01-354-2571 is a Valve,butterfly, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-354-2571?
7 possible matches (shared part number, not a government interchangeability claim): 4810-01-354-2572, 4810-01-354-2573, 4820-01-354-2576. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-354-2571?
Key specifications for 4820-01-354-2571: Special Features: WITH WORM GEAR OPERATOR. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-354-2571 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.