Left.W/DYNAMIC CHASSIS CONTROL. Right.W/DYNAMIC CHASSIS CONTROL. A solid metal or plastic bLock with a threaded hole in the center which is used to tighten or adjust the Differential Housing Mount. A solid metal or plastic bLock with a threaded hole in the center which is used to tighten or adjust the Suspension Strut Fork. Lateral Arm Nut. Mounting Nut For Suspension Shock Absorber. Nut For the Engine Mount. Part cannot be reused/reinstalled. Rack and Pinion Nut. Suspension Control Arm Nut. Suspension Crossmember Nut. Suspension Stabilizer Bar Link Nut. Suspension Strut Nut.