Countersunk Head with Wings Zinc Plating Self Drilling Screws
- Fixing timber to metal substructure.
- The wings ream up a clearance hole, its diameter is larger than the screw’s thread.
- The wings shears of the wood when drilling the screw into the wood.
- The under-head ribs trim the drilled hole for a clean countersink.
- Wings on the shaft counter-bore hard material and allow the head to countersink for a clean look.