Rothoblaas presents the KKT screw for outdoor use with conical head of small dimensions for an optimal concealment effect on the wood.
Inverse underhead thread (left-handed) for excellent grip.
Front triangular thread for excellent grip and wood penetration.
Colors & Materials
The carbon steel version with organic coating is available in five different colors and is equipped with a double-notched self-piercing tip that increases the cutting capacity of the fibers during screwing; the A4 stainless steel version is equipped with a self-piercing tip with a single notch and is also available with brown or gray head. The version with total thread is recommended for fixing in coupling with connectors for terraces and facades. The tip is included in each package for all versions.
Aesthetically pleasing and long-lasting fastening, thanks to the extremely small conical head that becomes ever less visible in the wood as time goes on.
The inverse underhead thread generates excellent grip capacity for the screw, which allows for perfect closure of the joint as well as stable fastening. The double-notched tip increases this effect.
A4 stainless steel screws guarantee excellent resistance to corrosion even in very aggressive environments. The A4 version with a coloured head is ideal for invisible fastening.