For automated, high-speed assemblies, the Huck Auto-Bulb® is the perfect solution.  It’s designed with an easy-to-use lead-in point, which means fast, reliable installation. It works by clamping the joint with a broad, blind side bulb, which makes it a good choice for use within thin materials, and within oversized, misaligned, or slotted holes. Unlike other bulbing blind fasteners, Auto-Bulb’s unique bulbing system creates superior blind side bearing strength. Auto-Bulb is available in both steel and 400 stainless steel for corrosion resistance.

  • Unique bulbing system for superior blind side strength
  • Positive mechanical bolt retention ensures structural integrity
  • Easy-to-use lead in point for fast installation
  • Ideal for high pull-out strength in thin materials
  • Good for automated, high-speed assemblies

Available Sizes:  3/16", 1/4"

Materials:  Steel, Stainless Steel

Headstyles:  Protruding, Countersunk




The Huck Auto-Bulb® with hole-finding head technology is engineered to suit automated assembly applications. 

Additional options are available. For further assistance, please contact your local sales office.


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