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Main Support Member for HAS 21K/40K Suspension

#HEN064643-000

Product Overview


Main Support Members, which are also called Z springs or Z bars, are an integral part of the suspension.

Features & Benefits


  • Hendrickson supplies the same genuine springs for service requirements that are installed in original Hendrickson supsensions -- with the same design, construction, performance and durability.
  • As a leading manufacturer of main support members, Hendrickson supplies major OEM truck manufacturers throughout the world.
  • Unique Alloy -- Hendrickson’s main support members are manufactured using a unique, proprietary, fine-grain alloy with high tensile strength, developed specifically by Hendrickson engineers and steel manufacturers.
  • Unique Alloy -- The attributes of this alloy enable Hendrickson to optimize the balance between roll stiffness, ride quality and long service life.
  • Reduces weight while increasing strength, spring life, roll stability, and ride quality.
  • Uniquely tempered with our proprietary heat treating process to further improve fatigue life and durability.
  • Stress peened for maximum residual stress providing longer spring life
  • Latest in paint and paint processes for advanced corrosion protection

Interchanges & Equivalent parts:


338-1932, 64643000, 064643-000, 64643000, 338-1932, 064643-000