Roller Chain Sprocket Bore Diameter 5/8 in For Chain Pitch 5/8 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 1 in Number of Teeth 11 Outside Diameter 2.5 in Pitch Diameter 2.219 in Bore Type Plain Chain Number 50 Finish Black Oxide Hub Diameter 1 3/4 in Hub Projection 0.657 in Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 1 in Number of Set Screws 0 Set Screw Location Not Applicable