PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

Y303701011Valve,regulating,fluid Pressure

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-00-007-4595 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-007-4595 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-007-4595. Primary manufacturer part number: Y303701011.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Material Document and Classification: UNABLE TO DECODE
  • Flow Control Device: DISK, TOP GUIDED
  • First End Raised Face Diameter: 4.125 INCHES NOMINAL IN
  • Material: STEEL FLOW CONTROL DEVICE
  • Regulation Type: AUTOMATIC SINGLE STAGE
  • Body Style: STRAIGHT THRU
  • First End Flange Outside Diameter: 7.000 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Flow Control Device construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-007-4595, 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 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-007-4595
Primary Part NumberY303701011
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Material Document and ClassificationUNABLE TO DECODE
Flow Control DeviceDISK, TOP GUIDED
First End Raised Face Diameter4.125 INCHES NOMINAL IN
MaterialSTEEL FLOW CONTROL DEVICE
Regulation TypeAUTOMATIC SINGLE STAGE
Body StyleSTRAIGHT THRU
First End Flange Outside Diameter7.000 INCHES NOMINAL IN
Media for Which DesignedSTEAM
First End Bolt Circle Diameter5.500 INCHES NOMINAL IN
First End Style DesignatorRAISED
First End Flange Shape StyleROUND W/ BOLT HOLES
Face to Face Distance11.625 INCHES NOMINAL IN
First End Bolt Hole Diameter0.750 INCHES NOMINAL IN
End Connection Quantity2
Valve Loading MethodSPRING
First End Bolt Hole Quantity4
FilterNOT INCLUDED
Second End Relationship with First EndIDENTICAL
First End Flange Thickness0.625 INCHES NOMINAL IN
MaterialCOBALT ALLOY SEAT
Nondefinitive Spec/std DataA CLASS AND D COMPOSITION
Temp Rating250.0 FAHRENHEIT MAXIMUM DEGF
First End Raised Face Height0.063 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4820-00-935-5359 INTERCHANGEABLE
Valve,regulating,fluid Pressure
4820-01-119-1177Y303700511 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
LNS5D Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Y303701011 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
17390N2 1-2IN150PSI Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
MIL-V-17848 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
21721N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-00-935-5359INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
4820-01-119-1177INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
Y303700511

Frequently Asked Questions

What is NSN 4820-00-007-4595?

NSN 4820-00-007-4595 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 4820-00-007-4595?

NSN 4820-00-007-4595 has 5 cross-referenced part numbers: LNS5D (Leslie Controls, Inc. Dba Leslie Controls Inc), Y303701011 (Leslie Controls, Inc. Dba Leslie Controls Inc), 17390N2 1-2IN150PSI (Leslie Controls, Inc. Dba Leslie Controls Inc), MIL-V-17848 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 21721N (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-00-007-4595?

There are 2 known substitutes for 4820-00-007-4595: 4820-00-935-5359, 4820-01-119-1177. Verify interchangeability with system specifications before substitution.

What are the specifications of Y303701011?

Key specifications for Y303701011: Material Document and Classification: UNABLE TO DECODE; Flow Control Device: DISK, TOP GUIDED; First End Raised Face Diameter: 4.125 INCHES NOMINAL IN; Material: STEEL FLOW CONTROL DEVICE. 24 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