Roller Chain Sprocket Bore Diameter 5/8 in For Chain Pitch 3/4 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 5/8 in Number of Teeth 10 Outside Diameter 2.76 in Pitch Diameter 2.427 in Bore Type Fixed Chain Number 60 Finish Black Oxide Hub Diameter 1 15/16 in Hub Projection 0.791 in Includes Set Screws Keyway Yes Keyway Width 3/16 in Length through Bore 1 1/4 in Number of Set Screws 2