PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

41291Piston

Parker Hannifin Corporation Div Hydraulic Systems Division · NSN 4320-01-120-6656 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-120-6656 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-120-6656. Primary manufacturer part number: 41291.
Features
  • Piston — FSC 4320
  • 1 verified cross-reference
  • Primary manufacturer: Parker Hannifin Corporation Div Hydraulic Systems Division
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Piston, cataloged under National Stock Number 4320-01-120-6656, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Parker Hannifin Corporation Div Hydraulic Systems Division. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NamePiston
FSC / FSG4320 — No Item Name Available (FSG 43)
ManufacturersParker Hannifin Corporation Div Hydraulic Systems Division (CAGE 93835)
Technical Specifications
ParameterValue
NSN4320-01-120-6656
Primary Part Number41291
Item NamePiston
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Hydraulic Systems Division
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
1560-00-122-467541291 INTERCHANGEABLE
Housing,pulley
Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company
5360-00-786-807812629 INTERCHANGEABLE
Spring,helical,compression
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
6650-01-665-580741291 INTERCHANGEABLE
Cap,lens
Energy Focus, Inc. Div Mmm
Cross-Reference Index
Part NumberManufacturer
41291 PRIMARY Parker Hannifin Corporation Div Hydraulic Systems Division (USA)
Related Parts
1560-00-122-4675INTERCHANGEABLE
HOUSING,PULLEY
41291
5360-00-786-8078INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
12629
6650-01-665-5807INTERCHANGEABLE
CAP,LENS
41291

Frequently Asked Questions

What is NSN 4320-01-120-6656?

NSN 4320-01-120-6656 is a Piston, manufactured by Parker Hannifin Corporation Div Hydraulic Systems Division, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-120-6656?

NSN 4320-01-120-6656 has 1 cross-referenced part number: 41291 (Parker Hannifin Corporation Div Hydraulic Systems Division).

What NSN replaces 4320-01-120-6656?

There are 3 known substitutes for 4320-01-120-6656: 1560-00-122-4675, 5360-00-786-8078, 6650-01-665-5807. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com