SFS double-thread screws self-drilling steel znb WT-T-8,2x275

TORX (from the English word ‘torque’) is the registered word mark for a screw drive profile, the standard designation for which is ‘internal six-lobe’ (English: ‘six lobe, internal socket’). With the six-lobe internal socket, the screw and tool are subjected to less radial stress than with the traditional internal hexagon, and consequently suffer less damage. Torque is transmitted more directly via the radial parts of the tooth flanks rather than via the faces of the hexagon.

Carbon steel has different mechanical properties depending on the carbon content. Low-carbon steels are weaker and softer but are easily machined and welded, while high-carbon steels are stronger but significantly more difficult to machine. All carbon steels are susceptible to rust, making them unsuitable for many end uses.

The special surface stands for high corrosion resistance and guarantees long-lasting protection against corrosive environmental influences. Durocoat® 480 corresponds to a corrosion resistance of 480 hours in the salt spray test according to DIN EN ISO 9227.