Torx wood screws with countersunk head WKCS 4.5x40 mm (250 pcs) Construction screws with countersunk head and TX socket Model: WKCS-45040 Size: 4.5x40mm Packaging: 250 pcs Tip: TX-20 material: low carbon steel, electro-galvanized Original Product of a Renowned Company Wkręt-Met ® Product Specification [ dw ] outer thread diameter: Ø 4.5 mm [ d1 ] inner thread diameter: Ø 2.95 mm [ ds ] diameter of the smooth part: Ø 3.1 mm [ Dw ] head diameter: Ø 9 mm [ Lw ] screw length: 40 mm [ Lg ] minimum thread length: 22 mm [ t fix ] maximum usable length: 18 mm Socket: TX 20 quantity in package: 250 WKCS screws are designed for connecting wooden and wood-based elements (chipboard, plywood, wood, OSB boards, MDF boards). Their innovative design makes working with them a pure pleasure. They do not require pre-drilling. The deep and stable TORX socket effectively transfers torque without the bit popping out. Features and Benefits 1.) Countersunk head with TX socket The countersunk head ensures proper countersinkability and flushness in the fastened element The deep TX socket guarantees optimal torque transfer without the "bit popping out" effect 2.) Cutting tabs Thanks to the cuts, the screw head sinks more easily, providing an aesthetic surface finish 3.) Countersunk cutter reduces the torque moment necessary for screwing by widening the hole in the fastened element 4.) Cutting notches Special cutting notches on the thread cut the fibers of the wood structure during screwing 5.) Milling tip The special shape of the milling tip means 20% less resistance when screwing, which extends the life of the battery and the tools themselves. 6.) Double thread Additional threads on the tip facilitate screwdriving - they allow for faster "grip" of the wood with less pressure, without pre-drilling a hole 7.) Wax coating A special wax coating applied during the manufacturing process reduces the torque when driving the screw. This makes installation faster and easier, and consumes less energy, which is important in battery-powered tools. 8.) High torque Enables screwdriving into hard types of wood without pre-drilling. New milling tip shape The innovative change in the screw design is designed to further improve its assembly properties even faster assembly, less resistance, greater battery savings (more screws driven on a single charge) reliable durability. Attention! The auction includes two types of screw models (with old and new shanks). Due to the manufacturer continuing to supply us with two types of screw models, we cannot guarantee that you will receive a screw with the desired shank . Double thread - faster installation Additional coils on the tip allow to "grab" the wood faster in the first stage of screwing. This advantage is particularly important in connections where tightening the screw is difficult. Double thread allows us to achieve the same effect with much less clamping force. Up to 40% faster screwdriving time In tests conducted prior to product launch, we confirmed that the new screw tip shape reduces screwdriving time by up to 40% under the same load. The savings depend on the type of connection and the wood used. Old tip New tip Up to 20% less resistance when screwing New shape of the milling tip reduces resistance when screwing up to 20% .This parameter is particularly important for those specialists who use cordless tools on a daily basis - it extends the battery life. a.) Screw-in resistance Nm, b.) Anchorage depth, 1.) Old tip, 2.) New tip. High strength parameters Designed in cooperation with contractors, the new tip of carpentry screws facilitates installation and is characterized by high strength parameters such as: pull-out strength, shear strength, etc. a.) Pull-out strength, kN 1.) Old tip, 2.) New tip. Examples of applications for WKCS screws include: Connection of structural beams at an angle, Connection of beams in the structure of a wooden pergola, Roof truss construction, Connection of rafters to wall plates, Fastening battens and counterbattens, Mounting boards to a wooden structure Mounting boards to a wooden structure Mounting garden furniture Additionally, these screws are ideal for a variety of applications in wooden elements, including solid wood structures, laminated wood structures, and wood-like panels. It's worth noting that, depending on their size, these screws may have different properties: Thicker screws have higher shear strength, Screws with a larger threaded area offer better pull-out strength. The length of structural screws depends on the thickness of the elements being connected. It's crucial when installing carpentry screws that the entire threaded area is engaged in the underlying material. Importantly, the screw tip should not penetrate the material. Substrates Carpentry screws are designed for joining wood and wood-based materials. Currently, more and more new investments are being made using CLT, LVL, KVH, and BSH wood. Using carpentry screws in these projects will increase the economy and ergonomics of work. Carpentry screws are also designed for joining wood with materials such as plywood, chipboard, fiberboard, OSB, and cement-bonded particleboard. Carpentry screws are products that require appropriate calculations. Their proper placement and quantity influence the safety of the structure. During design and selection, their arrangement, the type of load they are subjected to and the forces acting on the screws should be taken into account, i.e. pulling the head through the fastened element, pulling the carpentry screw out of the structure by a tensile force or a shearing force that may break the connection. Solid wood Glued solid wood (CLT, KVH, BSH/GLT, LVL) Wood-like boards (OSB, MDF, plywood, chipboards) Carpentry screws are becoming more and more popular, replacing traditional nails thanks to their many advantages: ability to carry significant loads, ease and speed of assembly, precise connection of screwed elements, improving the stiffness of the entire structure, enable easy corrections during assembly - in the event of an error during assembly, it is possible to easily unscrew and re-screw the screw. Installation method Only original screws supplied by the manufacturer may be used Before starting the installation, select the appropriate length of the screws depending on the thickness of the elements to be fixed and the minimum anchorage depth The connected wooden elements should be free from defects (knots, cracks, discoloration, rot, mechanical damage), as this reduces their strength The installation of screws should be carried out using a screwdriver and a suitable bit for a TX type socket The screws can be screwed directly into the wooden substrate without pre-drilling holes or in pre-drilled holes, which reduces the risk of cracking small components. The diameter of the pilot holes should not be larger than the internal diameter of the thread. The minimum spacing between screws and the distance from the edge must be observed. (declaration of performance) Video presenting the product https://youtu.be/XIhNuI2q75s?si=LACSXP2kFjQRgiKJ https://youtu.be/dmLkjZQvOKs?si=QRC5hzPABDCvEpni Certificates: European Certificate ETA-18/0817 - a guarantee of the highest quality The screws were made in accordance with the standard PN-EN 14592-2008 This European Standard specifies requirements and test methods for materials, geometry, strength, stiffness and durability (i.e. corrosion protection) of fasteners used in load-bearing timber structures The screws we offer are characterized by the highest quality and can be safely used in construction. We make every effort to ensure that the products supplied to our contractors are safe and adapted to specific tasks. On our other auctions you will find a full range of screw sizes *the measuring tape and screwdriver are not part of the auction (they are only used for better presentation of the screws)