Dual expansion anchor

摘要

A dual expansion anchor comprising a pair of inner and outer expansion fasteners connected to each other by means of a screw-threaded connecting tie, said expansion fasteners being adjustable on the connecting tie to adjust to the spaced positions of an inner supporting structure and an outer supported wall. Insertion limiting means is provided to limit insertion of the inner expansion fastener into the inner supporting structure in order to fix the position of said expansion fastener in said supporting structure. Torque applying means applied to the connecting tie expands the inner expansion fastener. Torque applying means applied to a nut on the connecting tie expands the outer expansion fastener.