Tekscrews Also Known As Self Drilling Screws; Drill Their Own Pilot Hole In Thin Sheet Metal. Tekscrew Design Features Pointed Drill Bit At Top Of Screw. Normally To Be Used Together With Bonded Washer.
Used In Masonry Materials That Expand Once Inserted; Hole To Be Pre-Drilled M5 Uses 9mm Drill Bit; When Tightning The Bolt; Nut Is Pulled Into Shell; ..