PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N63674Spring Cartridge Assembly

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-064-8021 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-064-8021 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-064-8021. Primary manufacturer part number: N63674.
Features
  • Spring Cartridge Assembly — FSC 4820
  • General Characteristics Item Description: CONSISTS OF 8 ITEMS; P/N 63655,INNER SPRING SEAT,CRES AISI TYPE 302; P/N 63665,INNER SPRING,NICKEL CHROME ALLOY WIRE; P/N 63656,INNER SPRING COUPLING,CRES AISI TYPE 304; P/N 63657,OUTER SPRING COUPLING,CRES AISI TYPE 304; P/N @63658,@SPRING SEAT,CRES ASTM A-312; P/N 63661,WASHER,CRES AISI TYPE 304,P/N 63664,OUTER SPRING,NICKEL CHROME ALLOY WIRE; P/N 63659,OUTER SPRING SEAT,CRES AISI TYPE 302
  • 7 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
General Description

The Spring Cartridge Assembly, cataloged under National Stock Number 4820-01-064-8021, 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 1 verified specification, 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-064-8021
Primary Part NumberN63674
Item NameSpring Cartridge Assembly
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
General Characteristics Item DescriptionCONSISTS OF 8 ITEMS; P/N 63655,INNER SPRING SEAT,CRES AISI TYPE 302; P/N 63665,INNER SPRING,NICKEL CHROME ALLOY WIRE; P/N 63656,INNER SPRING COUPLING,CRES AISI TYPE 304; P/N 63657,OUTER SPRING COUPLING,CRES AISI TYPE 304; P/N @63658,@SPRING SEAT,CRES ASTM A-312; P/N 63661,WASHER,CRES AISI TYPE 304,P/N 63664,OUTER SPRING,NICKEL CHROME ALLOY WIRE; P/N 63659,OUTER SPRING SEAT,CRES AISI TYPE 302
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
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
4820-01-147-7937N63651 INTERCHANGEABLE
Piston,valve
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
63674 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25460N PC28A THRU 28J Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25654N PIECE 28A THRU 28TH Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N63674 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25460N PIECE 28 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25460N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
25654N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
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
4820-01-147-7937INTERCHANGEABLE
PISTON,VALVE
N63651
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 4820-01-064-8021?

NSN 4820-01-064-8021 is a Spring Cartridge Assembly, 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 4820-01-064-8021?

NSN 4820-01-064-8021 has 7 cross-referenced part numbers: 63674 (Leslie Controls, Inc. Dba Leslie Controls Inc), 25460N PC28A THRU 28J (Leslie Controls, Inc. Dba Leslie Controls Inc), 25654N PIECE 28A THRU 28TH (Leslie Controls, Inc. Dba Leslie Controls Inc), N63674 (Leslie Controls, Inc. Dba Leslie Controls Inc), 25460N PIECE 28 (Leslie Controls, Inc. Dba Leslie Controls Inc) and 2 more.

What NSN replaces 4820-01-064-8021?

There are 9 known substitutes for 4820-01-064-8021: 4820-01-062-5501, 4820-01-063-5948, 4310-01-063-8575 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N63674?

Key specifications for N63674: General Characteristics Item Description: CONSISTS OF 8 ITEMS; P/N 63655,INNER SPRING SEAT,CRES AISI TYPE 302; P/N 63665,INNER SPRING,NICKEL CHROME ALLOY WIRE; P/N 63656,INNER SPRING COUPLING,CRES AISI TYPE 304; P/N 63657,OUTER SPRING COUPLING,CRES AISI TYPE 304; P/N @63658,@SPRING SEAT,CRES ASTM A-312; P/N 63661,WASHER,CRES AISI TYPE 304,P/N 63664,OUTER SPRING,NICKEL CHROME ALLOY WIRE; P/N 63659,OUTER SPRING SEAT,CRES AISI TYPE 302. 1 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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