PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

303056601Valve,regulating,fluid Pressure

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-00-287-3585 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-287-3585 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-287-3585. Primary manufacturer part number: 303056601.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • First End Style Designator: OPTIONAL END
  • Furnished Items: INTERNAL PILOT VALVE
  • Media for Which Designed: STEAM
  • Second End Relationship with First End: IDENTICAL
  • Material Document and Classification: FED STD 66 FED SPEC SINGLE MATERIAL RESPONSE OR AISI 410/SAE 51410 ASSN STD SINGLE MATERIAL RESPONSE SEAT
  • Flow Control Device: DISK, BEVEL SEAT, TOP GUIDED AND DISK, BEVEL SEAT, BOTTOM GUIDED
  • First End Thread Direction: RIGHT-HAND
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 410 and Cobalt Alloy Seat construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-287-3585, 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 5 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-287-3585
Primary Part Number303056601
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
First End Style DesignatorOPTIONAL END
Furnished ItemsINTERNAL PILOT VALVE
Media for Which DesignedSTEAM
Second End Relationship with First EndIDENTICAL
Material Document and ClassificationFED STD 66 FED SPEC SINGLE MATERIAL RESPONSE OR AISI 410/SAE 51410 ASSN STD SINGLE MATERIAL RESPONSE SEAT
Flow Control DeviceDISK, BEVEL SEAT, TOP GUIDED AND DISK, BEVEL SEAT, BOTTOM GUIDED
First End Thread DirectionRIGHT-HAND
Maximum Inlet Pressure RatingERR-060
Regulation TypeMANUAL SINGLE STAGE
FilterNOT INCLUDED
End Connection Quantity2
Remote Actuation MethodPISTON
Manual Control MethodWHEEL
Valve Loading MethodSPRING
Outlet Pressure Range15.0 TO 280.0 CAMERA MOUNT
Renewable Seat Ring TypeTHREADED
MaterialSTEEL COMP 410 AND COBALT ALLOY SEAT
Thread Size and Series/type Designator1-1/2-11-1/2 NPT FIRST END
Material Document and ClassificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 420 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 51420 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
MaterialSTEEL COMP 420 FLOW CONTROL DEVICE
Body StyleSTRAIGHT THRU
First End Connection TypeTHREADED INTERNAL PIPE
Material Document and ClassificationASTM B61 ASSN STD SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
Valve Stem DesignSINGLE SEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5999-00-035-8729 INTERCHANGEABLE
Contact,electrical
5995-00-171-107530341 INTERCHANGEABLE
Lead,electrical
Te Connectivity Corporation
4820-00-288-6642 INTERCHANGEABLE
Valve,regulating,fluid Pressure
4820-00-288-7410 INTERCHANGEABLE
Valve,regulating,fluid Pressure
4810-00-382-954830341 INTERCHANGEABLE
Sleeve and Slide,directional Con
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
2815-00-457-0007199822 INTERCHANGEABLE
Piston,internal Combustion Engin
Cummins Inc.
6610-00-886-4967296 INTERCHANGEABLE
Amplifier,control I
Power Control Devices, Inc.
4820-01-007-4046U303171202 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Leslie Controls, Inc. Dba Leslie Controls Inc
5935-01-026-0839402674 INTERCHANGEABLE
Jack,tip
Aimtron Systems, Llc
5910-01-176-4475P19978-009-01 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
Us Army Aviation and Missile Command
Cross-Reference Index
Part NumberManufacturer
30-3-4-1 11/2 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
30-3-4-1 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
L223F Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
30-3-4-1 1 1/2 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
303056601 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5999-00-035-8729INTERCHANGEABLE
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5995-00-171-1075INTERCHANGEABLE
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30341
4820-00-288-6642INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
4820-00-288-7410INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
4810-00-382-9548INTERCHANGEABLE
SLEEVE AND SLIDE,DIRECTIONAL CON
30341
2815-00-457-0007INTERCHANGEABLE
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6610-00-886-4967INTERCHANGEABLE
AMPLIFIER,CONTROL I
296
4820-01-007-4046INTERCHANGEABLE
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U303171202
5935-01-026-0839INTERCHANGEABLE
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SHAFT,STRAIGHT
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VALVE,REGULATING,FLUID PRESSURE
303056401

Frequently Asked Questions

What is NSN 4820-00-287-3585?

NSN 4820-00-287-3585 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 4820-00-287-3585?

NSN 4820-00-287-3585 has 5 cross-referenced part numbers: 30-3-4-1 11/2 (Leslie Controls, Inc. Dba Leslie Controls Inc), 30-3-4-1 (Leslie Controls, Inc. Dba Leslie Controls Inc), L223F (Leslie Controls, Inc. Dba Leslie Controls Inc), 30-3-4-1 1 1/2 (Leslie Controls, Inc. Dba Leslie Controls Inc), 303056601 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-00-287-3585?

There are 12 known substitutes for 4820-00-287-3585: 5999-00-035-8729, 5995-00-171-1075, 4820-00-288-6642 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 303056601?

Key specifications for 303056601: First End Style Designator: OPTIONAL END; Furnished Items: INTERNAL PILOT VALVE; Media for Which Designed: STEAM; Second End Relationship with First End: IDENTICAL. 24 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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