Chipboard screw 4.0x30 Torx Professional chipboard screw with special cutting head that prevents splitting of material. With high-end glidening coating and Torx head. Packaged per 200 pieces. Special features PROFTEC galvanized chipboard screws with flat countersunk head and TX drive are of professional quality for craftsmen who demand high standards from a good screw. The design of this screw was improved in 2023 and meets the highest quality requirements of the professional. Due to the coarse thread, the screws turn in quickly. A transparent wax layer has been applied to the screw, making them very easy to turn in and process. And due to the extra sharp and pointed screw tip, they grip directly into the wood. At the tip of the PROFTEC screw there is also a so-called pre-drilling 'cutting tip'; this allows you to work without pre-drilling in most cases, without splitting the wood. The 3.5 – 4.0 – 4.5 – 5.0mm screws can all be driven with the same TX-20 bit. So you don't have to change bits when screwing with different sized screws. Sharp milling ribs under the head ensure a neat finish when countersinking the screw head into the wood. All screws from 40mm length are designed as partial thread variants, with a spiral on the shaft; for optimal functioning in wood-to-wood connections. Due to the 'free' shaft section of the PROFTEC screw, the second wood part is pulled extra tightly against the first part, making the wood connection much stronger. The screws are packaged in a convenient plastic bucket, as bulk packaging. The recycled plastic bucket is easy to use and has a handle for lifting, which saves a lot of cardboard waste if you are going to use larger quantities of screws. Also, 2 bits are included in the bucket. Technical specifications Diameter {mm}: 4 Length {mm}: 30 Thread type: Full thread Head type: Flat head Drive: TX-20 Drive type: TX Drive size: 20 Milling ribs: External Drill point type: Cutting point type-17 Head diameter {mm}: 7.5 Material: Steel Surface treatment: Electrolytically galvanized Surface treatment color: Blue Lubricant: Gleitmo CE Standard: 14592 Quality mark: SHR Plug diameter: 5|6