NSN 4820-01-407-4903 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-407-4903. Manufacturer of record part number: YCS74190.
Manufacturer of record: Leslie Controls, Inc. Dba Leslie Controls Inc
Identification
NSN: 4820-01-407-4903
NIIN: 014074903
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: YCS74190
Manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
General Description
The Stem,fluid Valve, cataloged under National Stock Number 4820-01-407-4903, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Stem,fluid Valve
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Manufacturers
Leslie Controls, Inc. Dba Leslie Controls Inc (CAGE 35795)
Technical Specifications
Parameter
Value
NSN
4820-01-407-4903
Primary Part Number
YCS74190
Item Name
Stem,fluid Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Leslie Controls, Inc. Dba Leslie Controls Inc
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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-407-4905YCS74187POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-407-5151YCL74145POSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-407-75982498-00-286 8 PC. 5,6,7,8POSSIBLE MATCH
PARTS KIT,BUTTERFLY VALVE
Possible match (shared part number)Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-408-47482498-00-282 8INPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-408-47512498-00-282 10INPOSSIBLE MATCH
VALVE,BUTTERFLY
Possible match (shared part number)Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-433-1279YCA74139POSSIBLE MATCH
GEAR OPERATOR,VALVE
Possible match (shared part number)Leslie Controls, Inc. Dba Leslie Controls Inc
Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Reference documents
Reference
Meaning
YCS74190
5/9Secondary reference
Circor Intl Inc
CS74190
5/9Secondary reference
Leslie Controls, Inc. Dba Leslie Controls Inc
CS74190
5/9Secondary reference
Circor Intl Inc
2498-00-282
D/9Drawing number reference only
Circor Intl Inc
2498-00-282 5 PC.5,6,7,8
5/9Secondary reference
Circor Intl Inc
Related Parts
4820-01-407-4905POSSIBLE MATCH
STEM,FLUID VALVE
YCS74187
4820-01-407-5151POSSIBLE MATCH
VALVE,BUTTERFLY
YCL74145
4820-01-407-7598POSSIBLE MATCH
PARTS KIT,BUTTERFLY VALVE
2498-00-286 8 PC. 5,6,7,8
4820-01-408-4748POSSIBLE MATCH
VALVE,BUTTERFLY
2498-00-282 8IN
4820-01-408-4751POSSIBLE MATCH
VALVE,BUTTERFLY
2498-00-282 10IN
4820-01-433-1279POSSIBLE MATCH
GEAR OPERATOR,VALVE
YCA74139
Frequently Asked Questions
What is NSN 4820-01-407-4903?
NSN 4820-01-407-4903 is a Stem,fluid Valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-407-4903?
NSN 4820-01-407-4903 has 1 manufacturer part number on file: YCS74190 (Leslie Controls, Inc. Dba Leslie Controls Inc).
What NSN replaces 4820-01-407-4903?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-407-4905, 4820-01-407-5151, 4820-01-407-7598. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-407-4903 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.