Formerly Emhart Teknologies & Infastech


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Threaded, removable speed fasteners that combine the speed of rivet placement with the benefits of being able to remove and re-fasten.

The Avdel Rivscrew Speed Fastening® system is a threaded, removable speed fastener that combines the speed of rivet placement with the benefits of being able to remove and re-fasten. Using a Rivscrew rivet removes the need for costly tapping or thread forming operation whilst creating a higher vibration resistant 'thread lock' compared to standard screws.

Key features and benefits

  • Expands radially during installation to form a thread in host material
  • Removable for servicing with a hex key and reusable
  • Various lengths available providing high clamp loads
  • Placed using a hexagon mandrel which expands the threaded diameter radially, adjacent to its six corners.
  • Providing a higher vibration resistant "thread lock" in the parent material compared to standard screws
  • Can be used to fasten most materials up to Vickers hardness 105 Hv5
  • Eliminates the need for costly tapping or thread-forming operations
  • Brigth tin plated steel option for ease of soldering and increase electrical conductivity
  • Placed using a unique repetition mandrel system for high speed assembly
  • Can be bowl fed for larger volume applications using automated equipment

Assembly materials

Rivscrew can be used to fasten materials up to Vickers hardness 105 Hv5:

  • Metal to plastic
  • Plastic to plastic
  • Aluminium alloy
  • Magnesium
  • Nylon and die-cast zinc
  • Electronic components

Assembly applications

  • Aluminium die-cast boxes
  • Cast magnesium
  • Semi-conductors to thin wall and extruded heatsinks
  • Semi-conductors to PCB's
  • PCB's to chassis assemblies
  • Fastening into injection molded plastic bosses
  • General engineering involving plastics, nylon, polycarbonate, etc.


  • Sizes: 2.8mm to 4.8mm
  • Material: Zinc plated steel
  • Headform: Dome
Rivscrew - Series
Material Headform Series
Low Carbon Steel Dome Rivscrew 1722/23
Dome (pre-formed) Rivscrew 1772
Dome (pre-formed) Rivscrew 1733


A small range of 01733 Rivscrew (4.8mm diameter large-flange coarse thread) fasteners are available for a selection of plastic bumper and special applications. A variety of special 01710 Rivscrew fasteners have also been developed for customer specific applications. Please contact your local representative for further information.

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 Speed Fastening 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:

> Speed Fastener - Customised Designs

Installation Equipment
Speed Fastener Installation Equipment can be found at the following page

> Speed Fasteners Installation Equipment

To select the suitable combination of Rivscrew nose equipment, mandrel and follower spring to equip the installation tool please refer to the Speed Fastening Systems catalog or the tool manuals.