PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N63651Piston,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-147-7937 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-147-7937 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-147-7937. Primary manufacturer part number: N63651.
Features
  • Piston,valve — FSC 4820
  • Material: STEEL CORROSION RESISTING
  • Valve Type for Which Designed: PRESSURE REDUCING
  • Valve Design Control Activity: 35795
  • Valve Model Number for Which Designed: QCLNS
  • Valve Size for Which Designed: 2.500 INCHES IN
  • 6 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Piston,valve, cataloged under National Stock Number 4820-01-147-7937, 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 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
NSN4820-01-147-7937
Primary Part NumberN63651
Item NamePiston,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
MaterialSTEEL CORROSION RESISTING
Valve Type for Which DesignedPRESSURE REDUCING
Valve Design Control Activity35795
Valve Model Number for Which DesignedQCLNS
Valve Size for Which Designed2.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5360-01-061-3204 INTERCHANGEABLE
Spring,helical,compression
4820-01-062-5501 INTERCHANGEABLE
Valve,steam Reducing
4820-01-063-594863645 INTERCHANGEABLE
Valve,flow Control
Sarco Inc
4310-01-063-8575B2631 INTERCHANGEABLE
Ring,piston
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
4310-01-064-7903B2632 INTERCHANGEABLE
Ring,piston
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
4820-01-064-8021N63674 INTERCHANGEABLE
Spring Cartridge Assembly
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-178-968363654 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-233-4951N63650 INTERCHANGEABLE
Liner,cylinder
Leslie Controls, Inc. Dba Leslie Controls Inc
4810-01-365-2968N69794 INTERCHANGEABLE
Housing,plunger,actuator
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-369-3581N69529 INTERCHANGEABLE
Diaphragm,actuator Valve,special
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
25654N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N63651 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
63651 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25460N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25654N PIECE 21 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25460N PIECE 21 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5360-01-061-3204INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
4820-01-062-5501INTERCHANGEABLE
VALVE,STEAM REDUCING
4820-01-063-5948INTERCHANGEABLE
VALVE,FLOW CONTROL
63645
4310-01-063-8575INTERCHANGEABLE
RING,PISTON
B2631
4310-01-064-7903INTERCHANGEABLE
RING,PISTON
B2632
4820-01-064-8021INTERCHANGEABLE
SPRING CARTRIDGE ASSEMBLY
N63674
4820-01-178-9683INTERCHANGEABLE
SEAT,VALVE
63654
4820-01-233-4951INTERCHANGEABLE
LINER,CYLINDER
N63650
4810-01-365-2968INTERCHANGEABLE
HOUSING,PLUNGER,ACTUATOR
N69794
4820-01-369-3581INTERCHANGEABLE
DIAPHRAGM,ACTUATOR VALVE,SPECIAL
N69529

Frequently Asked Questions

What is NSN 4820-01-147-7937?

NSN 4820-01-147-7937 is a Piston,valve, 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 4820-01-147-7937?

NSN 4820-01-147-7937 has 6 cross-referenced part numbers: 25654N (Leslie Controls, Inc. Dba Leslie Controls Inc), N63651 (Leslie Controls, Inc. Dba Leslie Controls Inc), 63651 (Leslie Controls, Inc. Dba Leslie Controls Inc), 25460N (Leslie Controls, Inc. Dba Leslie Controls Inc), 25654N PIECE 21 (Leslie Controls, Inc. Dba Leslie Controls Inc) and 1 more.

What NSN replaces 4820-01-147-7937?

There are 10 known substitutes for 4820-01-147-7937: 5360-01-061-3204, 4820-01-062-5501, 4820-01-063-5948 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N63651?

Key specifications for N63651: Material: STEEL CORROSION RESISTING; Valve Type for Which Designed: PRESSURE REDUCING; Valve Design Control Activity: 35795; Valve Model Number for Which Designed: QCLNS. 5 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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