Roller Chain Sprocket Bore Diameter 1 15/16 in For Chain Pitch 3/4 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 1 15/16 in Number of Teeth 17 Outside Diameter 4.46 in Pitch Diameter 4.082 in Bore Type Fixed Chain Number 60 Finish Black Oxide Hub Diameter 3 1/4 in Hub Projection 0.791 in Includes Set Screws Keyway Yes Keyway Width 1/2 in Length through Bore 1 1/4 in Number of Set Screws 2