PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40970Piston Assy

Parker Hannifin Corporation Div Hydraulic Systems Division · NSN 4320-01-127-9021 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-127-9021 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-127-9021. Primary manufacturer part number: 40970.
Features
  • Piston Assy — 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 Assy, cataloged under National Stock Number 4320-01-127-9021, 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NamePiston Assy
FSC / FSG4320 — No Item Name Available (FSG 43)
ManufacturersParker Hannifin Corporation Div Hydraulic Systems Division (CAGE 93835)
Technical Specifications
ParameterValue
NSN4320-01-127-9021
Primary Part Number40970
Item NamePiston Assy
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Hydraulic Systems Division
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5910-00-358-67115326 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Champion Aerospace Llc
5340-00-786-634111969 INTERCHANGEABLE
Seat,helical Compression Spring
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
6680-01-093-888140970 INTERCHANGEABLE
Gage Rod,liquid Level
Center - Moeller Products Llc
7510-01-123-8973DIA301980-04 INTERCHANGEABLE
Ribbon,inking
Nbi Inc
5120-01-430-2921 INTERCHANGEABLE
Handle,socket Wrench
5975-01-508-15850409700000 INTERCHANGEABLE
Ferrule,electrical Conduit
Weidmueller Terminations Inc
Cross-Reference Index
Part NumberManufacturer
40970 PRIMARY Parker Hannifin Corporation Div Hydraulic Systems Division (USA)
Related Parts
5910-00-358-6711INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
5326
5340-00-786-6341INTERCHANGEABLE
SEAT,HELICAL COMPRESSION SPRING
11969
6680-01-093-8881INTERCHANGEABLE
GAGE ROD,LIQUID LEVEL
40970
7510-01-123-8973INTERCHANGEABLE
RIBBON,INKING
DIA301980-04
5120-01-430-2921INTERCHANGEABLE
HANDLE,SOCKET WRENCH
5975-01-508-1585INTERCHANGEABLE
FERRULE,ELECTRICAL CONDUIT
0409700000

Frequently Asked Questions

What is NSN 4320-01-127-9021?

NSN 4320-01-127-9021 is a Piston Assy, 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 4320-01-127-9021?

NSN 4320-01-127-9021 has 1 cross-referenced part number: 40970 (Parker Hannifin Corporation Div Hydraulic Systems Division).

What NSN replaces 4320-01-127-9021?

There are 6 known substitutes for 4320-01-127-9021: 5910-00-358-6711, 5340-00-786-6341, 6680-01-093-8881 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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