Tech-Sert - Unheaded



Other materials available to order

For use in:    





Please note: Not all sizes stated are available from stock, please enquire for availability.

Please click here to download a pdf of this product information

Note: Due to the fact that fastening applications differ greatly, the below information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.

Dimension data
 Dimensional Data          
Thread size MetricM2*M2.5*M3M3.5M4M5M6M8*M10*
Unified 2* - 4* 6* 8* 10* ¼”* 5/16”*3/8”*
L mm
K mm
N mm
Recommended Hole Size mm (-0.0/+0.1) 3.2444.85.66.489.611.9
Minimum Wall Thickness mm

*Non preferred - Please enquire for availability

Non standard lengths and stud versions available on request 

Further information

Tech-Sert Information for designers 

The Tech-Sert has been designed for post mould installation into thermoplastics using heat or ultrasonics with the opposing knurls and vanes providing high levels of pull out and torque resistance. The symmetrical design means the insert can be installed either way round which allows for automated installation.


Rapid installation

Symmetrical design for automated installation

Allows for thin walls in the boss

High pull out and torque resistance

Installation Data

The Tech-Sert is installed using either heat or ultrasonics.

Heat Installation

Where heat is used you must ensure that the insert softens, but does not melt the plastic, which helps avoid flash forming around the top of the insert.

Ultrasonic Installation

Ultrasonic installation works best with low amplitude vibrations and enough power to soften the surrounding plastic.

Care should be taken to avoid excessive downward pressure being applied during installation which can result in the insert being forced into the hole rather than allowing the plastic to soften around it.