Left.2WD. Lower ball joint stud. MONOBEAM AXLE. Right.2WD. A threaded rod which is used along with a nut to provide clamping force to the Wheel Hub. A threaded Stud that secures a vehicle's Wheels to the Wheel Hub. Suspension Ball Joint Bolt.. and Amplifier; bearing. and Amplifier; rotor. and bearing. Lug. Spacer mount. Suspension Ball Joint. Included with: Hub.