ball joint. Left.2019-23. Lower cntrl arm nut. PartQualifier: ball joint. Right.2019-23. A fastener used to secure a Control Arm. Part cannot be reused/reinstalled. Suspension Ball Joint Nut / Washer. Suspension Control Arm Nut. Bushing. Hex Flange TORX Head. Mount. Suspension Ball Joint Nut / Washer.