Formerly Emhart Teknologies & Infastech


A two-piece breakstem fastener consisting of a rivet and tubular section which provide a wide grip range, controlled clamp and a large bearing area on both sides of the application.

The Avdel Avdelmate rivet is a two-piece wide-grip, breakstem fastener suitable for a range of applications in soft, thin sheet and brittle materials. The Avdelmate fastener brand is a new extension to the Avdel rivet portfolio that provides a targeted solution in certain niche market applications. Avdelmate fasteners provide a secure clamp without crushing the parent material and good hole fill due to the radially expanded rivet body. This makes the Avdelmate fastener ideal for stadium seating, furniture, playground equipment and racking applications.

Key features and benefits

  • Extra-wide grip range from 15.8 mm to 98.4 mm (5/8" to 3-7/8")
  • Large bearing area against both sides of the application spreads the tail bearing load/clamp load on the rear sheet to prevent damage
  • Clamps tightly and securely without crushing parent material
  • Excellent hole fill via radially expanded rivet body for a strong and vibration resistant joint
  • Rivet stem retained in tubular component avoids loose stems
  • Low profile headform on both sides of the application for a neat appearance

Assembly materials

Ideal for use in thin sheet, soft, brittle or low strength materials, Avdelmate can be used to fasten:

  • Metal to metal
  • Plastic to plastic
  • Metal to plastic
  • Metal rear sheet
  • Various composite materials

Assembly applications

  • Playgrounds equipment
  • Furniture
  • Racks
  • Stadium seating
  • Street signs


  • Sizes:4.8 mm and 6.4 mm (3/16" and 1/4")
  • Materials: Aluminium alloy and steel
  • Headforms: Dome
Avdelmate - Series
Material Headform Series
Steel Dome Avdelmate SSLMS
Aluminium Alloy Dome Avdelmate BALMS
Body: Aluminium
Mandrel: Steel
Tube: Aluminium
Dome Avdelmate BSLMS


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