PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

Y501835806Valve,regulating,fluid Pressure

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-207-7042 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-207-7042 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-207-7042. Primary manufacturer part number: Y501835806.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Filter: NOT INCLUDED
  • Valve Loading Method: SPRING
  • First End Raised Face Height: 0.250 INCHES NOMINAL IN
  • First End Raised Face Diameter: 2.000 INCHES NOMINAL IN
  • First End Style Designator: RAISED
  • Media for Which Designed: STEAM
  • First End Bolt Hole Quantity: 4
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Flow Control Device construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-207-7042, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-207-7042
Primary Part NumberY501835806
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
FilterNOT INCLUDED
Valve Loading MethodSPRING
First End Raised Face Height0.250 INCHES NOMINAL IN
First End Raised Face Diameter2.000 INCHES NOMINAL IN
First End Style DesignatorRAISED
Media for Which DesignedSTEAM
First End Bolt Hole Quantity4
Body StyleSTRAIGHT THRU
First End Flange Outside Diameter4.875 INCHES NOMINAL IN
First End Flange Shape StyleROUND W/ BOLT HOLES
First End Bolt Circle Diameter3.500 INCHES NOMINAL IN
First End Flange Thickness0.688 INCHES NOMINAL IN
Face to Face Distance8.500 INCHES NOMINAL IN
First End Connection TypeRAISED FACE FLANGE
Second End Relationship with First EndIDENTICAL
Flow Control DeviceDIAPHRAGM
First End Bolt Hole Diameter0.750 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
Maximum Inlet Pressure RatingERR-060
MaterialSTEEL BODY
End Connection Quantity2
Regulation TypeAUTOMATIC SINGLE STAGE
Remote Actuation MethodPISTON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4820-00-036-1599N1602803 INTERCHANGEABLE
Diaphragm,valve,flat
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
19728N 1IN Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
19728N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
21821N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Y501835806 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-00-036-1599INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
N1602803

Frequently Asked Questions

What is NSN 4820-01-207-7042?

NSN 4820-01-207-7042 is a Valve,regulating,fluid Pressure, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-207-7042?

NSN 4820-01-207-7042 has 4 cross-referenced part numbers: 19728N 1IN (Leslie Controls, Inc. Dba Leslie Controls Inc), 19728N (Leslie Controls, Inc. Dba Leslie Controls Inc), 21821N (Leslie Controls, Inc. Dba Leslie Controls Inc), Y501835806 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-207-7042?

There is 1 known substitute for 4820-01-207-7042: 4820-00-036-1599. Verify interchangeability with system specifications before substitution.

What are the specifications of Y501835806?

Key specifications for Y501835806: Filter: NOT INCLUDED; Valve Loading Method: SPRING; First End Raised Face Height: 0.250 INCHES NOMINAL IN; First End Raised Face Diameter: 2.000 INCHES NOMINAL IN. 23 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com