Formerly Emhart Teknologies & Infastech


Structural breakstem fasteners with exceptional shear and tensile strength and a large blind side bearing area against the rear sheet.

The Avdel Hemlok fastener is a structural breakstem fastener with exceptional shear and tensile strength. The Hemlok rivet features an interference lock ensuring the strongest vibration resistant joints whilst the large blind side bearing area spreads the load and prevents creep.

Key features and benefits

  • 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

Assembly materials

Hemlok can be used to fasten:

  • Metal to metal
  • Metal to plastic
  • Thin sheet to thick metal

Assembly applications

  • Automotive
  • Warehouse racking
  • Ladders


  • Sizes: 6.4mm (¼")
  • Materials: Aluminium alloy, steel
  • Headform: Protruding
Hemlok - Series
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.

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