Forgefix Concrete Frame Screw Torx High-Low Thread ZYP 7.5 x 122mm Box 100
is no longer available although you may find similar or newer versions below:
These Forgefix high-low thread Concrete Frame Screws are Zinc Yellow Passivated for increased resistance to corrosion
By design, TORX head screws resist cam-out much better than Phillips or Slotted screws
Supplied complete with cover caps and Torx bit.
APPLICATION:Extremely popular fixing for window and door frames
High-Low Thread screws have an excellent holding power in wood due to their alternating high and low thread heights.
Concrete Frame Screw Torx High-Low Thread ZYP 7.5 x 122mm Box 100
The Zinc Yellow Passivation process of electroplating is similar to the 'Galvanised' and 'Zinc Plated' processes but with the addition of a yellow dye