PartQualifier: rear. rear. Spring nut. W/AIR SUSPENSION. A solid metal or plastic bLock with a threaded hole in the center which is used to tighten or adjust the Suspension Leaf Spring. A solid metal or plastic bLock with a threaded hole in the center which is used to tighten or adjust the Transmission Support. Mounting Nut for Suspension Shock Absorber. Part cannot be reused/reinstalled. Part cannot be reused/reinstalled. Rack and Pinion Nut. Suspension Control Arm Nut. Suspension Shock Absorber Mount Nut. Included with: Lower Control Arm.