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 8 Outside Diameter 2.26 in Pitch Diameter 1.959 in Bore Type Plain Chain Number 60 Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 1 1/2 in Hub Projection 0.791 in Includes Set Screws Keyway Yes Keyway Depth 3/32 in Keyway Width 3/16 in Length through Bore 1 1/4 in Material Grade 1045