PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

Y303701111Valve,regulating,fluid Pressure

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-149-3115 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-149-3115 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-149-3115. Primary manufacturer part number: Y303701111.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Material Document and Classification: UNABLE TO DECODE
  • Material: STEEL UNS J03002 BODY
  • First End Flange Thickness: 0.875 INCHES NOMINAL IN
  • Regulation Type: AUTOMATIC SINGLE STAGE
  • First End Connection Type: RAISED FACE FLANGE
  • End Connection Quantity: 2
  • First End Flange Outside Diameter: 9.000 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Uns J03002 Body construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-149-3115, 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 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-149-3115
Primary Part NumberY303701111
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
MaterialSTEEL UNS J03002 BODY
First End Flange Thickness0.875 INCHES NOMINAL IN
Regulation TypeAUTOMATIC SINGLE STAGE
First End Connection TypeRAISED FACE FLANGE
End Connection Quantity2
First End Flange Outside Diameter9.000 INCHES NOMINAL IN
First End Raised Face Height0.062 INCHES NOMINAL IN
First End Bolt Hole Diameter0.750 INCHES NOMINAL IN
Flow Control DeviceSTEM AND INTEGRAL DISK
First End Bolt Hole Quantity5
First End Style DesignatorRAISED
Outlet Pressure Accuracy RatingERR-060
Face to Face Distance12.500 INCHES NOMINAL IN
Temp Rating400.0 FAHRENHEIT MAXIMUM DEGF
Maximum Inlet Pressure RatingERR-060
First End Flange Shape StyleROUND W/ BOLT HOLES
Media for Which DesignedSTEAM
FilterNOT INCLUDED
Second End Relationship with First EndIDENTICAL
First End Raised Face Diameter5.000 INCHES NOMINAL IN
First End Bolt Circle Diameter6.000 INCHES NOMINAL IN
Body StyleSTRAIGHT THRU
Valve Loading MethodSPRING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5915-00-090-374117390 INTERCHANGEABLE
Network,circuit Protection
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
3820-00-139-443717390 INTERCHANGEABLE
Tooth,rock
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
3030-00-388-99568849395 INTERCHANGEABLE
Belt,v
Gates Corporation
4820-00-456-2074 INTERCHANGEABLE
Valve,regulating,fluid Pressure
6625-00-504-2107112-40 INTERCHANGEABLE
Meter,arbitrary Scale
Keysight Technologies Inc
5330-00-860-98891947671 INTERCHANGEABLE
Gasket
Chrysler Realty Company Llc Dba Daimler Chrysler
3030-01-126-3832052956-0 INTERCHANGEABLE
Belt,v
Sea Cure Technology, Inc
5330-01-389-1373820-5787605-200 INTERCHANGEABLE
Gasket,spiral Wound
Naval Sea Systems Command
3950-01-476-608827433 PL ITEM:3 INTERCHANGEABLE
Block
Ingersoll-Rand Co Material Handling Div
8465-01-560-737317390 INTERCHANGEABLE
Case,handcuffs
Bianchi International Dba Bae Systems Products Group
Cross-Reference Index
Part NumberManufacturer
17390N/LNS 5D-3IN Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
17390/FLNS-5D 21978N/A 3IN. Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Y303701111 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
LNS-5D 21978N 3 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
17390 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
21978N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
17390N AND 2197 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5915-00-090-3741INTERCHANGEABLE
NETWORK,CIRCUIT PROTECTION
17390
3820-00-139-4437INTERCHANGEABLE
TOOTH,ROCK
17390
3030-00-388-9956INTERCHANGEABLE
BELT,V
8849395
4820-00-456-2074INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
6625-00-504-2107INTERCHANGEABLE
METER,ARBITRARY SCALE
112-40
5330-00-860-9889INTERCHANGEABLE
GASKET
1947671
3030-01-126-3832INTERCHANGEABLE
BELT,V
052956-0
5330-01-389-1373INTERCHANGEABLE
GASKET,SPIRAL WOUND
820-5787605-200
3950-01-476-6088INTERCHANGEABLE
BLOCK
27433 PL ITEM:3
8465-01-560-7373INTERCHANGEABLE
CASE,HANDCUFFS
17390

Frequently Asked Questions

What is NSN 4820-01-149-3115?

NSN 4820-01-149-3115 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 4820-01-149-3115?

NSN 4820-01-149-3115 has 7 cross-referenced part numbers: 17390N/LNS 5D-3IN (Leslie Controls, Inc. Dba Leslie Controls Inc), 17390/FLNS-5D 21978N/A 3IN. (Leslie Controls, Inc. Dba Leslie Controls Inc), Y303701111 (Leslie Controls, Inc. Dba Leslie Controls Inc), LNS-5D 21978N 3 (Leslie Controls, Inc. Dba Leslie Controls Inc), 17390 (Leslie Controls, Inc. Dba Leslie Controls Inc) and 2 more.

What NSN replaces 4820-01-149-3115?

There are 10 known substitutes for 4820-01-149-3115: 5915-00-090-3741, 3820-00-139-4437, 3030-00-388-9956 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of Y303701111?

Key specifications for Y303701111: Material Document and Classification: UNABLE TO DECODE; Material: STEEL UNS J03002 BODY; First End Flange Thickness: 0.875 INCHES NOMINAL IN; Regulation Type: AUTOMATIC SINGLE STAGE. 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