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 Cill ScrewsOther Window Screws Self Drill Friction Stay ScrewWindow Screws For Reinforced UPVC Frames CSNK Facet Head Screw – Metric ThreadWindow Screws For Reinforced UPVC Frames Weather Bar ScrewOther Window Screws