IMPACT PROFESSIONAL SCREW ZYP (350no) 5.0x80mm A mortar key around the

A mortar key around the edge of the airbrick ensures it can be securely fixed to the building fabric and a clip together facility provides a choice of ventilation sizes

Double type 17 point for immediate start in all timbers

The horizontal outlet is long enough to bridge through an overall wall thickness of 350mm without the need for an additional extension

Zinc plated for increased corrosion resistance

IMPACT PROFESSIONAL SCREW ZYP (350no) 5.0x80mm A mortar key around thePacked: 1 Ideal for use with Impact Drivers! Pozi recessed head for industry standard fit Ribbed double countersunk for a flush finish Hardened steel for high torque loads Milling shank helps clear hole in fixture Part threaded from 40mm to eliminate jacking of fixture Double type 17 point for immediate start in all timbers Zinc and yellow passivated for corrosion resistance 3 x driver bits included in each tub