HWF SDS Screws or ‘Tech Screws’ are used as a general purpose fastener for fixings to steel sections, mild steel, metal components and brackets. Imperial hex head with washer, coarse thread with self-drilling and tapping tip. No predrilling required. Zinc finish suited for indoor applications. Comes with EPDM Neoprene Sealing Washer (NEO) for compatibility with zinc and Colorbond coated roofing sheets for a watertight seal. C4 Galvanised and SS finish suited for external applications. For use with OZ78NS Nut Setters. Corresponding Colorbond colours also available upon request.
