Sprocket, Bore Diameter 5/8 in, For Chain Pitch 3/8 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 5/8 in, Number of Teeth 20, Outside Diameter 2.59 in, Pitch Diameter 2.397 in, Bore Type Fixed, Chain Number 35, Finish Black Oxide, Hub Diameter 1 15/16 in, Hub Projection 0.582 in, Includes Set Screws, Keyway Yes, Keyway Depth 3/32 in, Keyway Width 3/16 in, Length through Bore 3/4 in, Number of Set Screws 2