TechFast Heavy Duty Timber to Steel Roofing Screws 5.5 x 135mm Elementech Box 50

ManoMano

These Forgefix TechFast Timber to Steel CSK/Wing Screws have the following specification: Size: 5.5 x 135mm Clamping Thickness: 106mm Effective Thread Length: 107mm Pack Size: 50 Drill Tip: No.5 No.5 drill tip for self-drilling heavy gauge steel up to 12.5mm 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.5 drill tip for self-drilling light gauge steel up to 12.5mm 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, Weight: 2.11423309258 pounds, Manufacturer: ForgeFix