Formerly Emhart Teknologies & Infastech


Multi-grip structural breakstem fasteners providing a fully sealed joint and visible lock.

The Avdel Monobolt multi-grip structural rivet is a high strength structural blind rivet with a locked stem and a positive hole fill for use in heavy duty applications. Monobolt blind rivets are trademark Avdel products, designed and developed for demanding applications where safety and performance is paramount to the customer demands.

Key features and benefits

  • Multi-grip capability
  • High shear and tensile strength
  • Good sheet take-up performance
  • Visible lock for quick and easy inspection
  • Excellent hole fill via rapidly 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

Monobolt 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
  • Marine and hostile environments


  • Sizes: 4.8mm, 6.4mm and 10 mm (3/16", ¼" and 3/8")
  • Materials: Aluminium alloy, steel and stainless steel 304 grade / A2 and NEW: 316 grade / A4*
  • Headforms: Protruding and countersunk
Monobolt - Series
Material Headform Series
Steel Protruding
100° Countersunk
Monobolt 2771
Monobolt 2761

Stainless Steel 304 / A2
Stainless Steel 316 / A4*

100° Countersunk
Monobolt 2711
Monobolt 2721
Monobolt 2717*
Aluminum Alloy Protruding
100° Countersunk
Monobolt 2774
Monobolt 2764


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

*Why 316 Grade / A4 Stainless Steel?
The Monobolt range has now been extended through the addition of a 316 Grade / A4 stainless steel Monobolt suitable for applications in marine and hostile environments where 304 Grade / A2 stainless steel Monobolt may not be the most suitable solution.

316 Grade has a higher nickel content than other alloys and contains molybdenum. The molybdenum allows the material to deliver enhanced corrosion resistance particularly to pitting and crevice corrosion. Additionally this alloy lends itself to both forming and welding without excessive cracking. For this reason, it is particularly good for assemblies in marine and hostile environments.


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 nG3 is the preferred tool for the installation of Monobolt fasteners up to ø6.4 mm (1/4"). Monobolt fasteners ø10 mm (3/8") can be placed using Type 7287 and Type 73200 installation tools. For more information please see the following page

> Breakstem Fasteners Installation Equipment