Forgefix Concrete Frame Screws, High-low Thread

- 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 and re-positioning when fixing poles etc. - The Torx compatible head of the screw enables increased torque control. - APPLICATION: Extremely popular fixing for window and door frames. - Also now used as a versatile fixing for many applications in DIY, Joinery, Plumbing and Electrical trades. - The Zinc Yellow Passivation process of electroplating is similar to the 'Galvanised' and '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 compatible head screws resist cam-out much better than Phillips or Slotted screws. - Where Phillips heads were designed to cause the driver to cam out, to prevent over-tightening, Torx compatible heads were designed to prevent it and to achieve a desired torque consistently. - Torx compatible head sizes are described using the capital letter 'T', followed by a number. - A smaller number corresponds to a smaller point-to-point dimension of the screw head. - Only the proper driver can drive a specific head size without risk of ruining the driver or screw. - High-Low Thread screws have an excellent holding power in wood due to their alternating high and low thread heights.. - UK size :7.5 x 52mm, FR Size :7.5 x 52mm, ES Size : 7.5 x 52mm , DE Size: 7.5 x 52mm, IT size: 7.5 x 52mm, US & CA Size: 7.5 x 52mm . - code: UTTK13965