Control Arm Roto-Joint End, ¾”-16 Left Hand Thread- GM B-BodyThis fabricated Roto Joint is designed to replace spherical rod ends on UMI Performance control arms for the 1978 1996 GM B Body. This item will also work on many other brand control arms for the above listed vehicles that utilize a 16 left hand threaded rod end. See part # 0020 for right hand threaded Roto Joint. This Bushing end is designed to replace 16 left hand threaded rod ends by simply removing the rod end and screwing in this Roto Joint