SPAX low countersunk-head screw 7.5x100 T30 Wirox

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 extremely fast work that is far more efficient than with other drive types.

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

Unlike partial thread, full thread extends along the entire length of the screw. The more threads a screw has, the greater the tensile and compressive forces these screws can transfer into the wood. Our full-thread screws are primarily used for heavy-duty wood joints.

With WIROX, SPAX has developed a coating that provides significantly better corrosion protection than conventional zinc plating. WIROX screws do not use chromium(VI), which means the screws remain just as durable even after years in areas not directly exposed to the weather, while also being fully environmentally friendly. WIROX screws are the ideal choice for all open structures that are not directly exposed to the elements, such as carports and pergolas. For areas directly exposed to weather conditions, such as decks, we recommend our stainless steel screws.