Avdel® Interlock® delivers excellent performance in applications that require structural strength and vibration resistance combined with multi-grip capability in blind side applications.

This multi-grip structural breakstem fastener provides excellent hole fill to form a fully sealed, vibration-resistant joint. The Interlock® rivet can close large gaps and prevent sheet movement while the high shear and tensile strength enable the use of fewer Interlock® rivets per assembly.

Assembly applications include automotive, cabinets and enclosures, commercial vehicles, domestic appliances, and heating and ventilating. Interlock® rivets can be used to fasten metal to metal and metal to plastic.

Fast Facts:

  • Structural breakstem rivet.
  • Stem mechanically locked into body.
  • Blind hole, one-sided installation capability.
  • Multi-grip capability.
  • High shear and tensile strength.
  • Good sheet take-up performance.
  • Excellent hole fill via radially expanded 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.
  • Breakstem fasteners can be customized to meet unique assembly requirements.


  • Sizes: 4.8mm, 6.4mm (3/16", ¼") and 10 mm (3/8") steel version
  • Materials: Aluminum 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".

Customized 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 customized capabilities:

> Breakstem Fasteners & Sealing Plugs - Customized Designs


Installation Equipment

> ProSet® XT3

> ProSet® XT4

> ProSet® PB3400

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The availability of the products described on this site, and the product descriptions, may vary from country to country. Consult your STANLEY® Engineered Fastening Account Executive or your local distributor for specific product information.