SPAX 604393Universal Screw 3.5 x 30mm T-Star + Stainless Steel A2 200pc

This special drive is a so-called hexalobular internal. Compared to less precise-fitting drive types like Phillips or cross recess, the contact surface is many times larger with our T-STAR plus, and the T-STAR bits are always positioned optimally in the screw head. The maximum, precise force transmission from the screwdriver to the screw that results from the use of T-STAR plus thus enables simple and ultra-fast work with much more efficiency than with other drives. What this means for you: No more annoying bit slips from the screw head – you can take care of serial fastening in no time at all! Installing window and door frames with plastic and aluminium profiles calls for a head shape that can withstand high pulling forces whilst not being too thick. Our flat countersunk head ticks both boxes. It finds its place on our SPAX-RA full-thread screw, which is used for the plug-free fastening of window and door frames. As you might expect, the T-STAR plus drive takes care of force application.

What this means for you: No more obstructive screw heads inside window and door frames. In principle, all of our screws can be organised into two groups: screws with partial thread and screws with full thread. Screws with partial thread are ideal for fastening components like engineered wood boards, panels, floorboards and even squared timbers on load-bearing components like stud framing or posts (in this case, with our HI.FORCE). While the thread makes its way through the load-bearing component, the thread-free shank of the partial thread screw should pull all the way through the top attachment. When the screw is inserted further, the screw head pulls the upper component onto the lower one. By inserting the screw, maximum contact pressure is therefore created between the two components. Of course, this effect is ideal when the thread-free shank has at least the same thickness as the attachment What this means for you: Partial thread screws offer the ultimate clamping force in wood construction. The term 4CUT is used to describe the fact that the point of our screws is not rounded, but rather shaped like an arrow. These four edges displace the wood fibres upon insertion and thus create space for the core diameter of the screw.

The otherwise inevitable expansion at the core of the wood is effectively reduced, minimising wood splitting around the edges. The required cordless screwdriver torque is also reduced, since the screw core no longer needs to "squeeze" into the wood. What this means for you: Practically no pre-drilling required any longer – even in the edge areas of your workpiece that are normally prone to splitting! The 4CUT means you can skip an entire work step. With our stainless-steel screws, the abbreviation A2 refers to the alloy of the steel. ""A"" stands for austenite, a mix of iron and carbon with the alloying elements chrome, nickel and molybdenum. The 2(1-5) describes the alloy grade, in other words, the chrome and nickel content. Screws made of stainless steel A2 offer a high level of protection against corrosion and medium strength, However, they have low resistance to saltwater and acids. They are therefore a reliable, durable choice for outdoor applications in non-coastal areas. What this means for you: With our stainless steel A2 screws, you are optimally equipped for corrosion-resistant fastening in virtually all non-coastal construction projects.