Left.2 WHEEL DRIVE. Left.REG & QUAD CAB. Mount gasket mount bolt. Right.2 WHEEL DRIVE. Right.REG & QUAD CAB. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Axle Shaft to it's mounting point. Axle Hub Mounting Bolt. gasket. Hub ing. Drive. HEX FLANGE HEAD. Included with: Axle assembly, Part number listed is for estimating purpose only Contact dealer for specific prices axle assembly.