Formerly Emhart Teknologies & Infastech

High Strength Hexsert®

High strength Hexsert provides clamp force comparable to weld nuts and clinch nuts in high torque applications.

The Avdel High Strength Hexsert is a threaded insert which provides a clamp force comparable to weld nuts and clinch nuts in high torque applications. The hexagonal shape and large flange gives the High Strength Hexsert exceptional torque-to-turn strength in thin sheet materials whilst having safeguards against over tightening which can lead to thread stripping and the need for expensive rework.

Key features and benefits

  • Exceptional torque capability
  • High speed assembly
  • Provides high-strength threads in thin materials starting at 0.5mm
  • Increased thread strength
  • If excessive torque is applied, the screw shank should fail before the insert, avoiding over-tightening problems such as thread stripping and expensive rework
  • Installed and retrofitted with standard Avdel handtools, as well as multi-head and auto-feed robotic systems

Assembly applications

  • Tubular steel
  • Hydroformed parts
  • Magnesium castings
  • Aluminum extrusions

Material and finishes

  • Steel Zinc plated to BS 3382 and clear passivated to achieve 240 hours resistance to red corrosion (ASTM B117) Hexavalent Chromium-free


  • Sizes: M6, M8, M10 and M12
  • Large flange
  • Hexagon
High Strength Hexsert - Technical Data Sheets
Material Headform Series No.
Steel Large Flange High Strength Hexsert 39301


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
Threaded Insert Equipment can be found at the following page

> Threaded Insert Installation Equipment

74290 tool for hexagonal hole production
The 74290 tool compliments and extends the range of Avdel hand tools for installing threaded inserts, by offering the capability of producing hexagonal holes for threaded Hexsert® inserts into materials where access is only possible from one side. The 74290 tool allows customers to benefit from the non-rotational properties of hexagonal inserts compared with round inserts. This is achieved by drilling a round hole, then inserting the 74290 tool and forming a hex hole.

74290 tool

Flyer 74290 >>

74290 Equipment >>