Slack S21399-3

Hendrickson
Part# S21399-3
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Slack S21399-3 - Hendrickson
Automatic slack adjuster for air brake systems on heavy-duty trucks.
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Description

The Slack S21399-3 Slack Adjuster (S21399-3) is a mechanical component designed to maintain proper brake shoe-to-drum clearance in air brake systems. It automatically adjusts brake slack to ensure consistent braking performance and safety in commercial vehicle applications.

Key Specifications

  • Application: Air brake systems on heavy-duty trucks
  • Function: Automatic brake slack adjustment
  • Compatibility: Commercial vehicles, heavy-duty trucks
  • Construction: Steel housing, mechanical components
  • Features: Self-adjusting mechanism, corrosion-resistant finish
  • Quality: OEM Hendrickson Suspension part

Shipping Info

Next Day Air services are available for In Stock items. Our shipping cutoff time is Monday - Friday 4:30pm Eastern Standard Time (EST). 

 

For more shipping information, please see our Shipping & Delivery page.

More Information

Current Part# S21399-3
Part# variations HDR S21399-3,
HDRS21399-3
Manufacturer Hendrickson
Warranty Standard Manufactures