Concrete Screws - ZYP - Box of 100

• Designed to replace traditional masonry fixings • TX30 TX Drive recess to reduce driver wear & prevent camming-out • Serrated V-threads to achieve optimum insertion into all masonry types • Zinc plated and yellow passivated for increased corrosion resistance • High-Low thread on first 30mm to aid insertion and reduce torque • Ideal for fitting windows and door frames • Flat countersunk head with five locking ribs • All steel, non-flammable fixing conforming to BS 7671 standard’s 18th edition, which requires wiring systems to be supported by materials which are unlikely to prematurely collapse in the event of a fire.