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Squaresert® (Nutsert SQ®)

Steel, inserts with square body, providing very high torque-to-turn and pull-out performance in all materials.

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The Avdel Squaresert® is a steel threaded insert with a square body, providing very high torque-to-turn and pull-out performance in all materials. The Squaresert rivet has a large flange to increase the load bearing surface allowing the Squaresert to be used in thin sheet materials.

Key features and benefits

  • Square section and bore improves torque-to-turn by up to 350% in sheet metal compared to round body inserts
  • Increases punch life compared to hexagonal geometries
  • Superior pull-out performance
  • Can be used for very thin sheet materials from 0.50mm (0.02")
  • Access needed from only one side of the application, for high speed assembly
  • Provide a female thread in application
  • Can be installed in pre-coated or post painted applications without damaging the surface
  • Clamp two or more sheets
  • Various platings available to increase corrosion resistance
  • Large flange head provides a load bearing surface and reinforces the hole to prevent push-out
  • Can be used as a spacer and can be supplied with an underhead seal
  • Can be used with hand tools, pneumatic tools and fully automated machines to suit a wide range of assembly methods

Assembly applications

  • Automotive body mountings
  • Electrical enclosures
  • Soft sheet metal
  • Plastics & composites
  • Domestic appliances
  • General light fabrication


  • Thread Sizes: M5-M8
  • Material: Steel
  • Finishes: Zinc plated and clear trivalent passivated
  • Headform: Large flange
  • Hole Size: Metric
Squaresert® - Technical Data Sheets
Material Headform Series No.
Steel Large Flange Squaresert® GK08


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 Threaded Inserts
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 threaded inserts 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:
>>> Threaded Inserts - Customised Designs

Installation Equipment

Below mentioned you will find examples of Avdel® handtools and installation equipment which can be used to place Squaresert® inserts.

Tool Selection
Follow this link to find the tools suitable for your threaded insert:
>>> Placing Capablity Threaded Inserts Tools

Nose Equipment Selection
Follow this link to find the correct nose equipment for your breakstem fastener:
>>> Nose Equipment for Threaded Inserts Tools

For further information on specific nose equipment, please contact your local Avdel® representative or use our tool manuals:
>>> Tool Manuals

Complementary Information

A modular design automated system for M3-M10 threaded inserts.

Squaresert® Part Numbers

0GK08-70619 0GK08-72514 0GK08-72619 0GK08-72622 0GK08-72823