Roller Chain Sprocket Bore Diameter 5/8 in For Chain Pitch 5/8 in For Number of Strands Double Hub Type One Side Material Steel Maximum Bore Diameter 1 3/4 in Number of Teeth 16 Outside Diameter 3.52 in Pitch Diameter 3.204 in Bore Type Plain Chain Number 50-2 Finish Black Oxide Hub Diameter 2 1/2 in Hub Projection 0.705 in Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 1 3/4 in Number of Set Screws 0 Set Screw Location Not Applicable