Sprocket, Bore Diameter 1 in, For Chain Pitch 1 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 1 in, Number of Teeth 8, Outside Diameter 3.01 in, Pitch Diameter 2.613 in, Bore Type Plain, Chain Number 80, Finish Black Oxide, For Pitch Type Single Pitch, Hub Diameter 1 15/16 in, Hub Projection 1.05 in, Includes Set Screws, Keyway Yes, Keyway Depth 1/8 in, Keyway Width 1/4 in, Length through Bore 1 9/16 in, Material Grade 1045