PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

26531Seat,helical Compression Spring

Parker-Hannifin Corporation Dba Control Systems Division · NSN 5340-00-786-6984 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-786-6984 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-786-6984. Primary manufacturer part number: 26531.
Features
  • Seat,helical Compression Spring — FSC 5340
  • First Step Diameter: 0.3100 INCHES NOMINAL IN
  • End Diameter: 0.2650 INCHES NOMINAL IN
  • Design Type: SOLID
  • Distance From End to First Step: 0.0800 INCHES NOMINAL IN
  • Counterbore Length: 0.0750 INCHES NOMINAL IN
  • FSC Application Data: SERVOCYLINDER,HYDRAULIC FMLY TYPE 2,RETAINER,SPRING
  • Material: STEEL CORROSION RESISTING
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-786-6984, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Control Systems Division. Government technical data includes 9 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-786-6984
Primary Part Number26531
Item NameSeat,helical Compression Spring
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerParker-Hannifin Corporation Dba Control Systems Division
StatusACTIVE
First Step Diameter0.3100 INCHES NOMINAL IN
End Diameter0.2650 INCHES NOMINAL IN
Design TypeSOLID
Distance From End to First Step0.0800 INCHES NOMINAL IN
Counterbore Length0.0750 INCHES NOMINAL IN
FSC Application DataSERVOCYLINDER,HYDRAULIC FMLY TYPE 2,RETAINER,SPRING
MaterialSTEEL CORROSION RESISTING
Counterbore Diameter0.2450 INCHES NOMINAL IN
Bore Diameter0.0780 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 9
1650-00-288-5333713221 INTERCHANGEABLE
Plate-Seal,constant
Hamilton Sundstrand Corporation
4720-00-471-827926531 INTERCHANGEABLE
Hose,preformed
Gates Corporation
4730-01-075-58582653-1 INTERCHANGEABLE
Coupling Assembly
Safran Electronics & Defense, Avionics Usa, Llc Dba Use CAGE Code 879b2 for Cataloging
4920-01-077-808026531 INTERCHANGEABLE
Rectifier-Regulator Assembly
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
5950-01-099-3692678-0282-010 INTERCHANGEABLE
Reactor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5330-01-394-502326531 INTERCHANGEABLE
Seal,plain
Paccar Winch Inc Dba Paccar Winch Division
5305-01-599-618426531 INTERCHANGEABLE
Screw,cap,socket Head
Eagle Components, Inc
6665-01-599-733447-1588 INTERCHANGEABLE
Detector,radiac
Ludlum Measurements Inc
5120-01-603-450426531 INTERCHANGEABLE
Nutdriver
Wiha Quality Tools
Cross-Reference Index
Part NumberManufacturer
26531 PRIMARY Parker-Hannifin Corporation Dba Control Systems Division (USA)
Related Parts
1650-00-288-5333INTERCHANGEABLE
PLATE-SEAL,CONSTANT
713221
4720-00-471-8279INTERCHANGEABLE
HOSE,PREFORMED
26531
4730-01-075-5858INTERCHANGEABLE
COUPLING ASSEMBLY
2653-1
4920-01-077-8080INTERCHANGEABLE
RECTIFIER-REGULATOR ASSEMBLY
26531
5950-01-099-3692INTERCHANGEABLE
REACTOR
678-0282-010
5330-01-394-5023INTERCHANGEABLE
SEAL,PLAIN
26531
5305-01-599-6184INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
26531
6665-01-599-7334INTERCHANGEABLE
DETECTOR,RADIAC
47-1588
5120-01-603-4504INTERCHANGEABLE
NUTDRIVER
26531

Frequently Asked Questions

What is NSN 5340-00-786-6984?

NSN 5340-00-786-6984 is a Seat,helical Compression Spring, manufactured by Parker-Hannifin Corporation Dba Control Systems Division, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-786-6984?

NSN 5340-00-786-6984 has 1 cross-referenced part number: 26531 (Parker-Hannifin Corporation Dba Control Systems Division).

What NSN replaces 5340-00-786-6984?

There are 9 known substitutes for 5340-00-786-6984: 1650-00-288-5333, 4720-00-471-8279, 4730-01-075-5858 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 26531?

Key specifications for 26531: First Step Diameter: 0.3100 INCHES NOMINAL IN; End Diameter: 0.2650 INCHES NOMINAL IN; Design Type: SOLID; Distance From End to First Step: 0.0800 INCHES NOMINAL IN. 9 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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