The growth in the use of Plastic Thread Forming Screws is driven in part by the need to reduce the total weight of an increasing number of component assemblies, either new design or redesign.
The type of plastic selected for the required component performance means that it is essential to use a fastener that maximises clench properties by ensuring high strip out torque values and in many applications prevents loosening due to vibration. Plastic Thread Forming Screws are the ideal fastener for such applications where fasteners such as self-tapping screws for steel applications would fail due to their wide flank angles and shallow threads
Clevtec’s ever increasing range of Plastic Thread Forming Screws manufactured at our two plants in Birmingham UK, currently cover 2.2mm up to and including 6mm diameter Plastic Thread Forming Screws in metric and imperial sizes (including Tri-lobe).
There are so many versions of Plastic Thread Forming Screws available, we tend to manufacture to customers specific requirements
Ideally we would like a fully detailed drawing of what you require together with some idea of the volumes you will be ordering
In the absence of a drawing, we need to know the thread size and type (Imperial or Metric), what type of head you require, Pan Head, Pan Flange, Countersunk, Mushroom etc. Do the heads need to be marked? what type of drive do you require for the screw, we can do manufacture most standard forms in common use
The trickiest area in the absence of a detailed drawing is heat treatment and finish. again there are many different requirements that can trip up the unwary. Is the product property class 10.9 or is it a through harden/case harden treatment? All our heat-treated parts that require zinc plating (the most common finish) are hydrogen de-embrittled. The de-embrittling time can vary depending upon the heat treatment hardness that is specified
If you need any advice please call us