SELF-TAPPING INSERTS 

Technifast have a range of self-tapping inserts which are suitable for use with wood, plywood, chipboard and MDF.  View the details and size charts below to determine the most appropriate insert for your particular application.  For non standard threaded inserts, please contact our manufacturing team for details.


Series 121 Inserts

Series 121 inserts are for use in wood, plywood, chipboard and MDF.  This series is available in steel and has a deep course-pitched outside thread to provide maximum pullout strength.  There is also an internal cut-out to prevent wood particles impeding the screw. 

Nominal Thread Size M3 M4 M5 M6 M8 M10 M12 M16
Outside Diameter 6.0 8.0 10.0 12.0 16.0 18.5 22.0 25.0
Length (mm) 8.0 10.0 12.0 15.0 18.0 20.0 22.0 25.0
Recommended Hole Size Min / Max 4.6 / 5.2 5.7 / 6.6 7.6 / 8.5 9.4 / 10.4 12.6 / 14.0 15.1 / 16.5 18.3 / 19.8 21.3 / 22.8

 

Series 125 Inserts 

Steel hex-drive self-tapping inserts can be used in wood, plywood, chipboard and MDF. The Series 125 are designed for insertion with an allen key and do not have a thread cut-out.

Nominal Thread Size M4 M5 M6 M8 M10
Outside Diameter 8.0 10.0 12.0 16.0 18.5
Length (mm) 10.0 12.0 15.0 18.0 20.0
Hex Socket SW4 SW5 SW6 SW8 SW10
Recommended Hole Size Min / Max 6.6 / 7.2 8.4 / 9.2 10.0 / 10.8 14.0 / 14.8 16.2 / 17.2

 

Series 127 Inserts 

The Series 127 is a zinc alloy insert for soft woods and chipboard. It’s a more economical alternative to Series 121 and 125, but does not provide the same pull-out strengths. It has a hex recess for easy assembly.

Nominal Thead Size M5 M6 M8 M10
Length (mm) 13.0 13.0 13.0 13.0
Recommended Hole Size Min / Max 7.7 / 8.0 8.7 / 9.00 10.7 / 11.0 12.2 / 12.5

 

Series 300 Inserts

Series 300 inserts are self-tapping inserts with a fine external thread for use in harder materials, such as light metals and other non-ferrous metals, as well as plastics and thermosetting resins. A feature of the Series 300 insert is the slot cut into the insertion end at 180 degrees, this slot aids the removal of host material and provides a sharp cutting edge.

This series is available in case hardened steel (plated zinc and yellow passivate), brass and stainless steel 303 or marine grade stainless steel 316.  

The insert must always be inserted slotted end first, as the slot provides the cutting action to tap into the application material.

 

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