TIMCO Concrete Screws Flat Countersunk Silver 7.5 x 80

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 for increased corrosion resistance High-Low thread on first 30mm to aid insertion and reduce torque Ideal for fitting windows and door frames, Weight: 3.527396192 pounds, Manufacturer: TIMCO