7.5 x 40 Multi-Fix Concrete Screw (100 PER BOX)

A rapid and effective light duty anchoring system for fixing into concrete, brick, stone, concrete block and wood. This through fixing provides a single solution and replaces traditional fixings such as nylon frame and hammer fixings. • 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.