For fastening through a nut to wood, with a plug to masonry or concrete, e.g., for wall installations in sanitary areas. Be sure to clean the drill hole, as drill dust reduces the load-bearing capacity of the plug. Hardwood and plastic require pre-drilling. No additional drive is needed, so it can be screwed in using pliers or a counter nut. For screwing in. The additional metric thread allows for easy installation and disassembly using a nut. The galvanized surface provides simple corrosion protection. With its classic, non-sharp-edged wood thread, this screw is ideal for fastenings with plastic plugs. Practical gripping area for positioning the screw and applying a wrench.