Description:Part # 8L-4889 provides an auxiliary drive shaft that carries the bearings and seals and mounts the belt driven pulleys to drive auxiliary systems on Cat engines.Attributes:• Hardened steel auxiliary drive shaft• Flange Diameter: 88.9 mm (3.50 in)• Overall Length: 168.28 mm (6.63 in)• Hole Thread Size: 5/16-18 in (6X)• Shaft Thread Size: 1.173-18Application:Consult your owner's manual or contact your local Cat Dealer for more information.