SPAX countersunk partial thread universal screw 5x70/41 T20 A2 (100 pcs/pack)

The typical SPAX T-STAR plus drive is a hexalobular internal drive. This design increases the contact surface of the T-STAR plus screwdriver and ensures optimal positioning of T-STAR plus bits in the screw head. By enabling maximum power transfer from the screwdriver to the screw, T-STAR plus ensures simple and very fast work that is much more efficient than with other drive types.

The flat countersunk head has a polygonal underside ("pockets") that mills its way into the wood, allowing it to be countersunk without pre-drilling the screw hole. The flat countersunk head sits flush with the surface.

Partially threaded screws are ideal for fastening thin components such as wood-based panels, paneling, and floorboards to thicker components such as rectangular timber beams or joists. The short thread penetrates the thick component, while the unthreaded shank remains in the attached part. This creates maximum contact pressure between the two. The unthreaded section should be at least as thick as the attached component.

The term 4CUT refers to the arrow-shaped design of the screw tip. These edges displace the wood fibers as the screw is driven in and create space for the core diameter of the screw. Expansion of the wood core is reduced, which helps prevent the wood from splitting around the edges. The torque required from the cordless screwdriver is also reduced, since the screw core no longer has to "force" its way into the wood.

In our stainless steel screws, the abbreviation A2 refers to the steel alloy. Screws made of A2 stainless steel provide a high level of corrosion protection and medium strength. However, their resistance to saltwater and acids is low. For this reason, they are used outdoors in non-coastal areas.