PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

15447Seat,helical Compression Spring

Pneudraulics, Inc. · NSN 5340-00-403-5178 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-403-5178 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-403-5178. Primary manufacturer part number: 15447.
Features
  • Seat,helical Compression Spring — FSC 5340
  • Design Type: SOLID
  • First Step Length: 0.0500 INCHES NOMINAL IN
  • Spherical Seat Top Radius: 0.1600 INCHES NOMINAL IN
  • Material Hardness Rating: 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM
  • Second End Diameter: 0.2500 INCHES NOMINAL IN
  • Material: STEEL
  • First Step Diameter: 0.4800 INCHES NOMINAL IN
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel construction
General Description

The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-403-5178, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Pneudraulics, Inc.. Government technical data includes 11 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-403-5178
Primary Part Number15447
Item NameSeat,helical Compression Spring
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerPneudraulics, Inc.
StatusACTIVE
Design TypeSOLID
First Step Length0.0500 INCHES NOMINAL IN
Spherical Seat Top Radius0.1600 INCHES NOMINAL IN
Material Hardness Rating58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM
Second End Diameter0.2500 INCHES NOMINAL IN
MaterialSTEEL
First Step Diameter0.4800 INCHES NOMINAL IN
Bore Diameter0.1250 INCHES NOMINAL IN
End Diameter0.2770 INCHES NOMINAL IN
Distance From End to First Step0.0600 INCHES NOMINAL IN
Style DesignatorSEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 6
Bracket,mounting
5950-00-059-7642 INTERCHANGEABLE
Reactor
5977-00-854-1073 INTERCHANGEABLE
Brush Holder Assy
1660-00-980-76841-54-47 INTERCHANGEABLE
Parts Kit,regulator
Mission Systems Orchard Park Inc
5950-01-305-132215447 INTERCHANGEABLE
Coil,electrical
Vanguard Electronics, Llc
6150-01-422-7583FEC15447 INTERCHANGEABLE
Lead Assembly,electrical
The First Electronics Corporation
Cross-Reference Index
Part NumberManufacturer
15447 PRIMARY Pneudraulics, Inc. (USA)
Related Parts
5340-01-537-8390SUCCESSOR
BRACKET,MOUNTING
5950-00-059-7642INTERCHANGEABLE
REACTOR
5977-00-854-1073INTERCHANGEABLE
BRUSH HOLDER ASSY
1660-00-980-7684INTERCHANGEABLE
PARTS KIT,REGULATOR
1-54-47
5950-01-305-1322INTERCHANGEABLE
COIL,ELECTRICAL
15447
6150-01-422-7583INTERCHANGEABLE
LEAD ASSEMBLY,ELECTRICAL
FEC15447

Frequently Asked Questions

What is NSN 5340-00-403-5178?

NSN 5340-00-403-5178 is a Seat,helical Compression Spring, manufactured by Pneudraulics, Inc., classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-403-5178?

NSN 5340-00-403-5178 has 1 cross-referenced part number: 15447 (Pneudraulics, Inc.).

What NSN replaces 5340-00-403-5178?

There are 6 known substitutes for 5340-00-403-5178: 5340-01-537-8390, 5950-00-059-7642, 5977-00-854-1073 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 15447?

Key specifications for 15447: Design Type: SOLID; First Step Length: 0.0500 INCHES NOMINAL IN; Spherical Seat Top Radius: 0.1600 INCHES NOMINAL IN; Material Hardness Rating: 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM. 12 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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