The window frame screw FBS 7,5-132 countersunk head (Ø 11 mm, TX30) is suitable for constraint force free distance mounting. A special zinc plated thread at the screw tip with reduced diameter reduces the setting torque and therefore allows a longer battery life of your cordless screwdriver. For quick and easy installation of many different window types in a large number of base materials. FBS is recommended for installation of metal and plastic window frames. In this process the external underhead milling ribs ensure flush finishing in all common frame materials.