Sprocket, Bore Diameter 1/2 in, For Chain Pitch 1/2 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 1 5/16 in, Number of Teeth 15, Outside Diameter 2.65 in, Pitch Diameter 2.405 in, Bore Type Plain, Chain Number 41, Finish Black Oxide, For Pitch Type Single Pitch, Hub Diameter 1 7/8 in, Hub Projection 0.648 in, Includes Set Screws, Keyway Yes, Keyway Depth 1/16 in, Keyway Width 1/8 in, Length through Bore 7/8 in, Material Grade 1045