The Ankernut is a synthetic rubber sleeve with a flange head and a brass threaded insert at the opposite end. They are mainly used in hollow base materials where the anchor can expand in the cavity. It is possible to use longer Ankernuts in solid material but a minimum embedment of 40mm is required.Typical Applications:Suspended services from hollow concrete planks, pipes, fan coils, cable tray and ventilation ductwork. Brackets and services from hollow block walls or perforated brick walls, also attachments to metal box section, metal angle and steel sheet