Avdel Hemlok

Fast Facts:

  • Structural breakstem rivet.
  • Retained stem.
  • Blind hole, one-sided installation capability.
  • Exceptional shear and tensile strength.
  • Large blind side bearing area against the rear sheet.
  • Interference lock formed by a splined stem.
  • Spreads the tail bearing/clamp load on the rear sheet.
  • Ideal for thin sheet materials.
  • 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: 6.4mm (¼”)
  • Materials: Aluminium alloy, steel
  • Headform: Protruding
Material Headform Series
Steel Protruding Hemlok® 2221
Aluminium Alloy Protruding Hemlok® 2241


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


The Hemlok® rivet features an interference lock ensuring the strongest vibration-resistant joints.

This structural breakstem fastener has exceptional shear and tensile strength and a large blind side bearing area against the rear sheet. The large blind side bearing area spreads the load and prevents creep.

The Avdel® Hemlok® fastener can be used to fasten metal to metal, metal to plastic, and thin sheet to thick metal.

Assembly applications include automotive, warehouse racking, and ladders.