Crest-Fixing Medium-Duty Timber Screw

Hex Flange Head Double Thread Type 17 Sharp Needle Point Self-Tapping Roofing Screw. Suitable for External Medium Duty Steel-To-Timber Applications, such as metal sheets to the timber structure. The Double Thread Design with a larger upper thread to better secures the screw to the crest of the roofing sheets, combined with the washer to further enhance the water-seal performance. The Type 17 Needle Point design help to improve the ability to remove the wood dust and minimize the risk of splitting the wooden material during the application.