Description
The SPAX-typical T-STAR plus drive is a so-called Torx socket. This shape increases the attack surface in our T-STAR plus, and the T-STAR plus bits fit optimally in the screw head. The best possible power transfer from screwdriver to screw by T-STAR plus enables a fast working, and much more efficient than with all other drives.
The countersunk head (or flat head) milled itself with its polygons bottom ("pockets") a recess in the wood and therefore can be recessed without additional lowering of the screw hole. The countersunk head locks flush with the surface.
The screws with partial thread are extremely suitable for attaching thin components such as wood material plates, boards or boards to thicker components such as square timber or beams. The short thread screws into the thick component; the thread-free shaft remains in the attachment part. This gives rise to the maximum contact pressure between the two. The thread-free part should be at least equal to the thickness of the attachment part.
The term 4CUT stands for the square shape of the screw tip. These edges supplant the wooden fibers during insertion and creates space for the core diameter of the screw. This reduces the spread pressure exerted by the Kern in the wood and prevents the wood from springing up close to the edges. The necessary torque of the cordless screwdriver is also reduced, because the Kern of the screw does not have to "squeeze" itself into the wood.
The abbreviation A2 on our stainless steel screws is based on the alloy of HER steel. Screws in the stainless steel version A2 offer high protection against corrosion and medium strength. Low is their resistance to seawater and acids. For this reason, they are screwed in outdoor areas that are far from the coast.
