The Timco 5.5 x 130mm self-drilling wing tip screws are specifically designed to attach wood to metal (max 5mm). The self-tapping thread has wings that are designed to ream out the timber, so the screw can achieve max RPM without burning out.
Salt spray tested to 1,000 hours
Wings break off when hitting the metal to permit the thread to self tap
Self-tapping screw with a hexagonal head
Zinc-plated steel for corrosion protection in indoor applications
Flange head to distribute the load
5.5mm (size 12)