PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50423ASpring,helical,extension

L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. · NSN 5360-00-316-3257 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-316-3257 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-316-3257. Primary manufacturer part number: 50423A.
Features
  • Spring,helical,extension — FSC 5360
  • Inside Diameter: 0.398 INCHES NOMINAL IN
  • Coil Quantity: 17-1/2
  • Coil to Hook Inside Length: 0.281 INCHES NOMINAL SECOND END IN
  • Surface Treatment: CADMIUM OVERALL
  • Spring Free Outside Diameter: 0.500 INCHES NOMINAL IN
  • Style Designator: CYLINDRICAL
  • Material: STEEL OVERALL
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Overall construction
General Description

The Spring,helical,extension, cataloged under National Stock Number 5360-00-316-3257, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-00-316-3257
Primary Part Number50423A
Item NameSpring,helical,extension
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerL3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.
StatusACTIVE
Inside Diameter0.398 INCHES NOMINAL IN
Coil Quantity17-1/2
Coil to Hook Inside Length0.281 INCHES NOMINAL SECOND END IN
Surface TreatmentCADMIUM OVERALL
Spring Free Outside Diameter0.500 INCHES NOMINAL IN
Style DesignatorCYLINDRICAL
MaterialSTEEL OVERALL
Hook Radius0.141 INCHES NOMINAL SECOND END IN
Spring Free Length1.219 INCHES NOMINAL IN
Design TypeCLOSED
End StyleMACHINE CUT-OFF BOTH ENDS
Coil Helix DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5815-00-356-3322SC-B-70045 INTERCHANGEABLE
Teletypewriter Subassembly
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5360-01-494-8147 INTERCHANGEABLE
Spring,helical,extension
Cross-Reference Index
Part NumberManufacturer
50423A PRIMARY L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (USA)
203226PCS7 L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (USA)
Related Parts
5815-00-356-3322INTERCHANGEABLE
TELETYPEWRITER SUBASSEMBLY
SC-B-70045
5360-01-494-8147INTERCHANGEABLE
SPRING,HELICAL,EXTENSION

Frequently Asked Questions

What is NSN 5360-00-316-3257?

NSN 5360-00-316-3257 is a Spring,helical,extension, manufactured by L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc., classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-316-3257?

NSN 5360-00-316-3257 has 2 cross-referenced part numbers: 50423A (L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.), 203226PCS7 (L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.).

What NSN replaces 5360-00-316-3257?

There are 2 known substitutes for 5360-00-316-3257: 5815-00-356-3322, 5360-01-494-8147. Verify interchangeability with system specifications before substitution.

What are the specifications of 50423A?

Key specifications for 50423A: Inside Diameter: 0.398 INCHES NOMINAL IN; Coil Quantity: 17-1/2; Coil to Hook Inside Length: 0.281 INCHES NOMINAL SECOND END IN; Surface Treatment: CADMIUM OVERALL. 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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