A support member of an anchor assembly , the support member for receiving and securing a threaded shaft thereto, the anchor assembly further including a base member that is connectable with the support member, the support member comprising: an outer housing , the outer housing being defined by a central longitudinal axis, the outer housing including an outer wall, the outer housing also including an insertion opening at a first end thereof for receiving the threaded shaft, the outer housing further including an assembly opening at a second end opposite the first end thereof, the outer wall defining an inner space , a jaw assembly disposed in the inner space, the inner space further includes a tapered surface with a lessening inner surface diameter toward the insertion opening, the jaw assembly including at least two threaded jaws the threads of which selectively engage threads of the shaft, the jaw assembly further including a bias member for biasing the at least two threaded jaws toward the longitudinal axis, a holding member for preventing the bias member from moving the at least two threaded jaws toward the longitudinal axis, wherein, in a first jaw assembly configuration, the holding member prevents the at least two threaded jaws from moving toward the central longitudinal axis; and wherein, in the first configuration the threaded shaft is inserted into the connector opening, to contact the holding member to release the at least two threaded jaws to move toward the central longitudinal axis and into biased contact with the threaded shaft to define a second jaw assembly configuration, wherein the jaw assembly further includes an alignment member linking the at least two jaws and limiting relative axial misalignment thereof, the support member including a rotation stop and wherein the alignment member engages the rotation stop to prevent the jaws from rotating relative to the support member. an outer housing , the outer housing being defined by a central longitudinal axis, the outer housing including an outer wall, the outer housing also including an insertion opening at a first end thereof for receiving the threaded shaft, the outer housing further including an assembly opening at a second end opposite the first end thereof, the outer wall defining an inner space , a jaw assembly disposed in the inner space, the inner space further includes a tapered surface with a lessening inner surface diameter toward the insertion opening, the jaw assembly including at least two threaded jaws the threads of which selectively engage threads of the shaft, the jaw assembly further including a bias member for biasing the at least two threaded jaws toward the longitudinal axis, a holding member for preventing the bias member from moving the at least two threaded jaws toward the longitudinal axis, wherein, in a first jaw assembly configuration, the holding member prevents the at least two threaded jaws from moving toward the central longitudinal axis; and wherein, in the first configuration the threaded shaft is inserted into the connector opening, to contact the holding member to release the at least two threaded jaws to move toward the central longitudinal axis and into biased contact with the threaded shaft to define a second jaw assembly configuration, wherein the jaw assembly further includes an alignment member linking the at least two jaws and limiting relative axial misalignment thereof, the support member including a rotation stop and wherein the alignment member engages the rotation stop to prevent the jaws from rotating relative to the support member. <EOS>