Avdel Avibulb High Strength Steel Breakstem Fasteners

High strength steel breakstem fasteners with excellent bulbing tail formation. Ideal for thin sheet materials. The Avdel® Avibulb also has the advantage of good hole fill compensating for irregular, oversized, or misaligned holes.

Suited for a wide range of general engineering applications. Avibulb is often used in automotive, electronics, and cabinet and enclosure assembly applications.

Available as a special version Earth Tab Rivet which combines a zinc plated and clear passivated steel Avibulb with a brass earthing tab.

  • Non-structural breakstem rivet.
  • Retained stem.
  • Blind hole, one-sided installation capability.
  • High shear and tensile strength.
  • Good hole fill.
  • Provides a large blind side bearing area against the rear sheet.
  • Ideal for applications requiring elevated temperatures.
  • Spreads the tail bearing load/clamp on the rear sheet.
  • Ideal for use in thin sheet materials.
  • Compensates for irregular, oversized, slotted, or misaligned holes.
  • Can stop sheet movement in non-standard holes.
  • Provides strong, vibration resistant joints.
  • No damage, electrical problems, or rattling due to loose stems.
  • Breakstem fasteners can be customized to meet unique assembly requirements.


  • Sizes: 3.2mm (1/8") to 6.0mm
  • Material: Steel, zinc & clear passivated
  • Headform: Dome
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