These Forgefix high-low thread Concrete Frame Screws are Zinc Yellow Passivated for increased resistance to corrosion. They offer a virtually stress free fixing,allowing close to edge applications. They are through-fixing,eliminating the need for marking & re-positioning when fixing batons etc. The Torx head of the screw enables increased torque control.
Extremely popular fixing for window & door frames. Also now used as a versatile fixing for many applications in DIY,Joinery,Plumbing & Electrical trades.
The Zinc Yellow Passivation process of electroplating is similar to the 'Galvanised' & 'Zinc Plated' processes but with the addition of a yellow dye. It offers an aesthetically pleasing finish,whilst having excellent resistance to corrosion.
By design,TORX head screws resist cam-out much better than PH or Slotted screws.