Home/Screws/Window Fabrication Screws/Window Screws For Reinforced UPVC Frames/CSNK Metric Thread Self Drill Screw CSNK Metric Thread Self Drill Screw CSNK metric thread self drill window screw. For attaching window hardware to reinforced UPVC frames. Available sizes: M4 x 16mm M4 x 19mm M4 x 25mm M4 x 32mm M4 x 38mm BZP Plating Category: Window Screws For Reinforced UPVC Frames Tags: Metric thread window screws, self drill window screws, UPVC window screws Related products CSNK Head Self Drill Screw – Heavy GaugeWindow Screws For Reinforced UPVC Frames Baypole ScrewsOther Window Screws Pan Head Self Drill ScrewWindow Screws For Reinforced UPVC Frames Weather Bar ScrewOther Window Screws