Formerly Emhart Teknologies & Infastech


Aluminum alloy breakstem fasteners with a split tail formation providing a very large blind side bearing area against the rear sheet.

The Avdel Bulbex breakstem fastener is designed with a split tail formation, providing a much larger blind side bearing area against the rear sheet. This also allows for a wide variation in material thickness. The Bulbex blind breakstem fastener is ideal for use with plastic and low strength material.

Key features and benefits

  • Multi-grip capability
  • Split tail formation provides a very large blind side bearing area against the rear sheet
  • Retained stem
  • Wide choice of installation tools
  • One fastener can often be used to replace several standard grip fasteners
  • Accommodates wide variations in material thickness
  • Reduced fastener inventory and simper stock control
  • Spreads the tail bearing load/clamp load on the rear sheet
  • No damage, electrical problems or rattling due to loose stems

Assembly applications

  • Caravans
  • Domestic appliances


  • Sizes: 4.0mm and 4.8mm (5/32" and 3/16")
  • Material: Aluminium alloy
  • Headform: Dome, large flange
Bulbex - Series
Material Headform Series
Aluminum Alloy Dome
Large Flange
Bulbex BF01
Bulbex BF41


Details can be found in the > Breakstem Systems Catalog available in our Document Library.

Surface finish options
If you are looking for other surface finish options than shown in the above datasheets please download our

> Surface Finishes and Fastener Matrix for Breakstem Systems.

This will show you what surface finish options are possible to apply to our standard fastener types as "customer specials".

Customised Designs
We can design and manufacture breakstem fasteners with a wide variety of forms and finishes to meet your unique assembly requirements. Please refer to this page to find examples of our customised capabilities:

> Breakstem Fasteners & Sealing Plugs - Customised Designs


Installation Equipment
Genesis Range Installation Equipment can be found at the following page

> Breakstem Fasteners Installation Equipment