Threaded plugs with a notched flange that makes them suitable for electrostatic powder painting, as the design prevents paint from forming a membrane around the plug. Instead, paint will form a smooth layer in the notch under the flange. These products are available in various materials and with different sealing solutions, depending on the high-temperature requirements. Hexagonal shape ensures easy mounting and dismounting using standard tools—automatic or semiautomatic. They are recommended for several applications, such as hydraulic units: gear pumps, control valves, cylinders, steering systems; engine components: blocks, heads, power train transmissions, etc. In this range some parts are available with washer or O-ring.