Concrete Screws
Concrete Screws or Masonry Screws are strong enough to penetrate concrete, masonry, brickwork, and stone, and also commonly have alternating high and low threads. Available in various type and sizes.
Size: M3.5 - M6、#6 - 1/4
Length: 9 - 150mm、3/8" - 6"
Flat Head Hi-Lo Thread
Hex Head Hi-Lo Thread
Special Wafer Head Hi-Lo Thread
Pan Head Hi-Lo Thread
Cylindrical Head concrete screw