Spax Chipboard screws SK T20 4,0x60 mm

The SPAX typical drive T-STAR plus is a so-called internal hexagon. This shape increases the contact surface of our T-STAR plus, allowing the T-STAR plus bits to fit optimally in the screw head. The best possible power transfer from the screwdriver to the screw through T-STAR plus enables quick work, significantly more efficient than with any other drives. The countersunk head (or flat countersunk head) mills a recess into the wood with its polygonal underside ("pockets") and can therefore be sunk without additional countersinking of the screw hole. The countersunk head sits flush with the surface.

The screws with partial thread are excellent for fastening thin components such as wood-based panels, boards, or planks to thicker components like timber or beams. The short thread screws into the thick component, while the unthreaded shaft remains in the attachment. This creates maximum clamping pressure between the two. The unthreaded part should be at least the thickness of the attachment.

The term 4CUT refers to the square shape of the screw tip. These edges displace the wood fibers during insertion and create space for the screw's core diameter. The spreading pressure exerted by the core in the wood is thus reduced, preventing the wood from splitting near the edges. Additionally, the required torque of the cordless screwdriver is decreased, as the core of the screw does not have to "squeeze" into the wood.

With WIROX, SPAX has developed a coating that is far superior to galvanization in terms of corrosion protection. WIROX does not use chromium (VI), and the screws remain just as durable after years in non-directly weathered outdoor areas, while also being environmentally friendly.