PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50659Parts Kit,hydraulic Pump

Parker Hannifin Corporation Div Hydraulic Systems Division · NSN 4320-00-780-5831 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-780-5831 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-780-5831. Primary manufacturer part number: 50659.
Features
  • Parts Kit,hydraulic Pump — FSC 4320
  • Component Quantity: 24
  • Nonsupply Items and Quantities: 75250 MS28774-011 RING 1;75250 MS28775-008 PKG PREFORMED 2;75250 MS28775-011 PKG PREFORMED 3;75250 MS28775-013 PKG PREFORMED 1;75250 MS28775-014 PKG PREFORMED 1;75250 MS28775-023 PKG PREFORMED 1;75250 MS28775-114 PKG PREFORMED 2;75250 MS28775-131 PKG PREFORMED 1;75250 MS28775-136 PKG PREFORMED 1;75250 MS2828775-226 PKG PREFORMED 1;75250 MS28778-2 PKG PREFORMED 1;75250 MS28778-4 PKG PREFORMED 3;75250 MS28778-5 PKG PREFORMED 1;75250 50099 SEAL,LEAD 2;75250 56444 HASKET 1;75250 56689 SEAL,PLAN ENCASED 1
  • 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 Parts Kit,hydraulic Pump, cataloged under National Stock Number 4320-00-780-5831, 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 2 verified specifications, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-780-5831
Primary Part Number50659
Item NameParts Kit,hydraulic Pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Hydraulic Systems Division
StatusACTIVE
Component Quantity24
Nonsupply Items and Quantities75250 MS28774-011 RING 1;75250 MS28775-008 PKG PREFORMED 2;75250 MS28775-011 PKG PREFORMED 3;75250 MS28775-013 PKG PREFORMED 1;75250 MS28775-014 PKG PREFORMED 1;75250 MS28775-023 PKG PREFORMED 1;75250 MS28775-114 PKG PREFORMED 2;75250 MS28775-131 PKG PREFORMED 1;75250 MS28775-136 PKG PREFORMED 1;75250 MS2828775-226 PKG PREFORMED 1;75250 MS28778-2 PKG PREFORMED 1;75250 MS28778-4 PKG PREFORMED 3;75250 MS28778-5 PKG PREFORMED 1;75250 50099 SEAL,LEAD 2;75250 56444 HASKET 1;75250 56689 SEAL,PLAN ENCASED 1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4820-00-200-0664CFA40614 INTERCHANGEABLE
Valve,globe
Curtis Dyna-Fog, Ltd.
3020-00-214-644850659 INTERCHANGEABLE
Gear,spur
Hamilton Sundstrand Corporation Dba Collins Aerospace
5950-00-497-8599163058 INTERCHANGEABLE
Transformer,power
Robert M. Hadley Company, Inc.
4820-01-091-2651N50659 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
5962-01-163-6281ICM7555MTV/883B INTERCHANGEABLE
Microcircuit,linear
Renesas Electronics America Inc
Cross-Reference Index
Part NumberManufacturer
50659 PRIMARY Parker Hannifin Corporation Div Hydraulic Systems Division (USA)
Related Parts
4820-00-200-0664INTERCHANGEABLE
VALVE,GLOBE
CFA40614
3020-00-214-6448INTERCHANGEABLE
GEAR,SPUR
50659
5950-00-497-8599INTERCHANGEABLE
TRANSFORMER,POWER
163058
4820-01-091-2651INTERCHANGEABLE
SEAT,VALVE
N50659
5962-01-163-6281INTERCHANGEABLE
MICROCIRCUIT,LINEAR
ICM7555MTV/883B

Frequently Asked Questions

What is NSN 4320-00-780-5831?

NSN 4320-00-780-5831 is a Parts Kit,hydraulic 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 4320-00-780-5831?

NSN 4320-00-780-5831 has 1 cross-referenced part number: 50659 (Parker Hannifin Corporation Div Hydraulic Systems Division).

What NSN replaces 4320-00-780-5831?

There are 5 known substitutes for 4320-00-780-5831: 4820-00-200-0664, 3020-00-214-6448, 5950-00-497-8599 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 50659?

Key specifications for 50659: Component Quantity: 24; Nonsupply Items and Quantities: 75250 MS28774-011 RING 1;75250 MS28775-008 PKG PREFORMED 2;75250 MS28775-011 PKG PREFORMED 3;75250 MS28775-013 PKG PREFORMED 1;75250 MS28775-014 PKG PREFORMED 1;75250 MS28775-023 PKG PREFORMED 1;75250 MS28775-114 PKG PREFORMED 2;75250 MS28775-131 PKG PREFORMED 1;75250 MS28775-136 PKG PREFORMED 1;75250 MS2828775-226 PKG PREFORMED 1;75250 MS28778-2 PKG PREFORMED 1;75250 MS28778-4 PKG PREFORMED 3;75250 MS28778-5 PKG PREFORMED 1;75250 50099 SEAL,LEAD 2;75250 56444 HASKET 1;75250 56689 SEAL,PLAN ENCASED 1. 2 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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