PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

63654Seat,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-178-9683 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-178-9683 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-178-9683. Primary manufacturer part number: 63654.
Features
  • Seat,valve — FSC 4820
  • 5 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-178-9683, 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. This item has 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersLeslie Controls, Inc. Dba Leslie Controls Inc (CAGE 35795); Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (CAGE 16236)
Technical Specifications
ParameterValue
NSN4820-01-178-9683
Primary Part Number63654
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
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
4820-01-147-7937N63651 INTERCHANGEABLE
Piston,valve
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
63654 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
4820V0772 Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
25460N PC 25 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25654N PIECE 25 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25654N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
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
4820-01-147-7937INTERCHANGEABLE
PISTON,VALVE
N63651
4820-01-369-3581INTERCHANGEABLE
DIAPHRAGM,ACTUATOR VALVE,SPECIAL
N69529

Frequently Asked Questions

What is NSN 4820-01-178-9683?

NSN 4820-01-178-9683 is a Seat,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 4820-01-178-9683?

NSN 4820-01-178-9683 has 5 cross-referenced part numbers: 63654 (Leslie Controls, Inc. Dba Leslie Controls Inc), 4820V0772 (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)), 25460N PC 25 (Leslie Controls, Inc. Dba Leslie Controls Inc), 25654N PIECE 25 (Leslie Controls, Inc. Dba Leslie Controls Inc), 25654N (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-178-9683?

There are 6 known substitutes for 4820-01-178-9683: 4820-01-063-5948, 4310-01-063-8575, 4310-01-064-7903 and 3 more. Verify interchangeability with system specifications before substitution.

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