Formerly Emhart Teknologies & Infastech


Multi-grip structural breakstem fasteners providing a fully sealed, vibration resistant joint.

The Avdel Interlock rivet is a multi-grip structural breakstem fastener with excellent hole fill to give a fully sealed joint. The Interlock rivet can close large gaps and prevent sheet movement whilst the high shear and tensile strength enable the use of fewer Interlock rivets per assembly.

Key features and benefits

  • Multi-grip capability
  • High shear and tensile strength
  • Good sheet take-up performance
  • Excellent hole fill via radially expanded body
  • Stem mechanically locked into body
  • Wide choice of installation tools
  • One fastener can be used to replace several standard grip fasteners
  • Reduced fastener inventory and simpler stock control
  • Compensates for irregular, oversized, slotted or misaligned holes
  • Can stop sheet movement in non-standard holes
  • Large gap closing capability
  • Provides very strong, vibration resistant joints
  • No damage, electrical problems or rattling due to loose stems

Assembly materials

Interlock rivets can be used to fasten:

  • Metal to metal
  • Metal to plastic

Assembly applications

  • Automotive
  • Cabinets and enclosures
  • Commercial vehicles
  • Domestic appliances
  • Heating and ventilating


  • Sizes: 4.8mm, 6.4mm (3/16", ¼")
    NEW: 10 mm (3/8") Steel version
  • Materials: Aluminium alloy, Steel and Stainless Steel
  • Headforms: Protruding and countersunk
Interlock - Series
Material Headform Series
Steel Protruding
100° Countersunk
Interlock SSPI
Interlock SSCI
Stainless Steel Protruding Interlock CCPI
Aluminium Alloy Protruding Interlock BAPI


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