PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21431Piston,pump

Parker Hannifin Corporation Div Hydraulic Systems Division · NSN 4320-01-351-1667 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-351-1667 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-351-1667. Primary manufacturer part number: 21431.
Features
  • Piston,pump — FSC 4320
  • Pin: NOT INCLUDED
  • 1 verified cross-reference
  • Primary manufacturer: Parker Hannifin Corporation Div Hydraulic Systems Division
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Piston,pump, cataloged under National Stock Number 4320-01-351-1667, 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. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference 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
NSN4320-01-351-1667
Primary Part Number21431
Item NamePiston,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Hydraulic Systems Division
StatusACTIVE
PinNOT INCLUDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5305-00-010-01600903639-3 INTERCHANGEABLE
Screw,cap,hexagon Head
Agco Corp Parts Opn
5950-00-059-7642 INTERCHANGEABLE
Reactor
4030-00-280-4792 INTERCHANGEABLE
Anchor,guy
5895-00-848-904321431-1 INTERCHANGEABLE
Switching Module,tr
Raytheon Company Dba Raytheon Co
4730-00-909-8627 INTERCHANGEABLE
Clamp,hose
6160-01-189-5722214-31 INTERCHANGEABLE
Filler Cap,battery
Heathkit Co Inc Dba Heathkit Educational Systems
5998-01-216-247521431 INTERCHANGEABLE
Circuit Card Assembly
Data Device Corp Dba Beta Transformer Technology
2530-01-414-5595 INTERCHANGEABLE
Cap,grease
4140-01-481-515021430 INTERCHANGEABLE
Axial,fan
G.s. Blodgett, Llc Div Blodgett
5310-01-728-537821431 INTERCHANGEABLE
Nut,plain,extended Washer,hexago
Auto Vehicle Parts Co Dba Au-Ve-Co
Cross-Reference Index
Part NumberManufacturer
21431 PRIMARY Parker Hannifin Corporation Div Hydraulic Systems Division (USA)
Related Parts
5305-00-010-0160INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
0903639-3
5950-00-059-7642INTERCHANGEABLE
REACTOR
4030-00-280-4792INTERCHANGEABLE
ANCHOR,GUY
5895-00-848-9043INTERCHANGEABLE
SWITCHING MODULE,TR
21431-1
4730-00-909-8627INTERCHANGEABLE
CLAMP,HOSE
6160-01-189-5722INTERCHANGEABLE
FILLER CAP,BATTERY
214-31
5998-01-216-2475INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
21431
2530-01-414-5595INTERCHANGEABLE
CAP,GREASE
4140-01-481-5150INTERCHANGEABLE
AXIAL,FAN
21430
5310-01-728-5378INTERCHANGEABLE
NUT,PLAIN,EXTENDED WASHER,HEXAGO
21431

Frequently Asked Questions

What is NSN 4320-01-351-1667?

NSN 4320-01-351-1667 is a Piston,pump, 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 4320-01-351-1667?

NSN 4320-01-351-1667 has 1 cross-referenced part number: 21431 (Parker Hannifin Corporation Div Hydraulic Systems Division).

What NSN replaces 4320-01-351-1667?

There are 10 known substitutes for 4320-01-351-1667: 5305-00-010-0160, 5950-00-059-7642, 4030-00-280-4792 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21431?

Key specifications for 21431: Pin: NOT INCLUDED. 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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