An anatomical shoulder fixation system having a stem having a plurality of holes configured to receive bone screws. The stem having compressible suture locking members protruding from the flared head portion configured to receive and lock an elongated member. The plurality of holes configured to have locking mechanisms abutting the holes. The locking mechanisms preventing the bone screw from backing out while also providing the screw the freedom necessary to realign itself during the healing process. In one locking mechanism embodiment, a locking member utilizing a frustoconical split ring configured lock within a retention groove of the bone screw. Another embodiment has a rotating member with a protrusion that locks into a retention groove of the bone screw. An alternative embodiment has a rotating member that rotates over the bone screw utilizing a complimentary angle between the screw head and the protrusion.
