PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1H6521Rotor,pump

Mitsubishi Caterpillar Forklift America, Inc · NSN 4320-00-509-1936 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-509-1936 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-509-1936. Primary manufacturer part number: 1H6521.
Features
  • Rotor,pump — FSC 4320
  • Material: STEEL
  • Outside Diameter: 3.438 INCHES NOMINAL IN
  • Inside Diameter: 1.000 INCHES NOMINAL IN
  • 11 verified cross-references
  • Primary manufacturer: Mitsubishi Caterpillar Forklift America, Inc
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
  • Applications requiring Steel construction
General Description

The Rotor,pump, cataloged under National Stock Number 4320-00-509-1936, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Mitsubishi Caterpillar Forklift America, Inc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4320-00-509-1936
Primary Part Number1H6521
Item NameRotor,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerMitsubishi Caterpillar Forklift America, Inc
StatusCANCELLED
MaterialSTEEL
Outside Diameter3.438 INCHES NOMINAL IN
Inside Diameter1.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
4730-00-073-176612627-3 INTERCHANGEABLE
Coupling,boss
Triumph Controls, Llc Dba Triumph Controls, Llc
5935-00-232-3778231333 INTERCHANGEABLE
Socket,plug-in Electronic Compon
L3harris Cincinnati Electronics Corporation
5360-00-316-420131364 INTERCHANGEABLE
Spring,helical,extension
Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions
5935-00-460-078110674055 INTERCHANGEABLE
Adapter,connector
Us Army Aviation and Missile Command
3110-00-470-81041630DS INTERCHANGEABLE
Bearing,ball,annular
Rbc Bearings Incorporated Div West Trenton Division
3030-00-529-133424557 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
3020-00-791-5712 INTERCHANGEABLE
Gear,spur
5965-01-028-0326 INTERCHANGEABLE
Microphone,dynamic
4730-01-519-84989678 INTERCHANGEABLE
Elbow,pipe
Spx Fluid Power
5331-01-544-74339678 INTERCHANGEABLE
O-Ring
DP Manufacturing Inc.
Cross-Reference Index
Part NumberManufacturer
07-858129 Lift Parts Mfg Co Inc Div of Echlin Mfg Co the (USA)
AB007085812 Brighton Cromwell Llc (USA)
T8884 Mitsubishi Caterpillar Forklift America, Inc (USA)
858129 Dana Off Highway Products, Llc (USA)
9678 Terex Reedrill Dba Reedrill Texoma Div Terex Mining (USA)
608884 Mitsubishi Caterpillar Forklift America, Inc (USA)
1H6521 PRIMARY Mitsubishi Caterpillar Forklift America, Inc (USA)
AB007085812 Ar Bee Corp (USA)
858129 Clark Equipment Co (USA)
1H6521 Caterpillar Inc Div Caterpillar Defense (USA)
126273 Eaton Aerospace, Llc Dba Jackson South (USA)
Related Parts
4730-00-073-1766INTERCHANGEABLE
COUPLING,BOSS
12627-3
5935-00-232-3778INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
231333
5360-00-316-4201INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
31364
5935-00-460-0781INTERCHANGEABLE
ADAPTER,CONNECTOR
10674055
3110-00-470-8104INTERCHANGEABLE
BEARING,BALL,ANNULAR
1630DS
3030-00-529-1334INTERCHANGEABLE
BELT,V
24557
3020-00-791-5712INTERCHANGEABLE
GEAR,SPUR
5965-01-028-0326INTERCHANGEABLE
MICROPHONE,DYNAMIC
4730-01-519-8498INTERCHANGEABLE
ELBOW,PIPE
9678
5331-01-544-7433INTERCHANGEABLE
O-RING
9678
6530-01-568-0730INTERCHANGEABLE
WIRE MESH BASKET,WASHER-DISINFEC
KGY498-8543-00

Frequently Asked Questions

What is NSN 4320-00-509-1936?

NSN 4320-00-509-1936 is a Rotor,pump, manufactured by Mitsubishi Caterpillar Forklift America, Inc, classified under FSC 4320 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4320-00-509-1936?

NSN 4320-00-509-1936 has 11 cross-referenced part numbers: 07-858129 (Lift Parts Mfg Co Inc Div of Echlin Mfg Co the), AB007085812 (Brighton Cromwell Llc), T8884 (Mitsubishi Caterpillar Forklift America, Inc), 858129 (Dana Off Highway Products, Llc), 9678 (Terex Reedrill Dba Reedrill Texoma Div Terex Mining) and 6 more.

What NSN replaces 4320-00-509-1936?

There are 11 known substitutes for 4320-00-509-1936: 4730-00-073-1766, 5935-00-232-3778, 5360-00-316-4201 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1H6521?

Key specifications for 1H6521: Overall Length: 1.188 INCHES NOMINAL IN; Material: STEEL; Outside Diameter: 3.438 INCHES NOMINAL IN; Special Features: OUTER PERIPHERY HAS 12 VANE SLOTS;0.750 IN. DP X 0.090 IN. W;INSIDE DIA HAS 13 SPLINES,1.000 IN. MINOR ID 1.1;72 IN. MAJOR ID IN. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4320-00-509-1936 still in active supply?

NSN 4320-00-509-1936 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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