TechFast Light Duty Timber to Steel Roofing Screws 5.5 x 80mm Elementech Box 100

Zoro Tools

Forgefix TechFast Timber to Steel CSK/Wing Screws are used to join timber to steel frame buildings. The screws are fitted with breakaway wings that create a clearance hole to protect thread from engaging timber when drilling through. Breakaway wings will ream a hole, then break-off when they contact the metal surface to be drilled. The thread will then engage with metal. They have a TORX compatible insert for a higher transmission of power. With improved countersinking from recessed ribs. Fire and corrosion resistant. Complies with EU Safety, Health and Environmental requirements.

Amazon

Used for joining Timber to steel frame buildings No.3 drill tip for self-drilling light gauge steel up to 5mm Screw fitted with breakaway wings that create a clearance hole to protect thread from engaging timber when drilling through Breakaway wings will ream a hole then break-off when they contact the metal surface to be drilled Torx compatible insert for a higher transmission of power, Manufacturer: ForgeFix