Roller Chain Sprocket Bore Diameter 1 in For Chain Pitch 1 1/4 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 2 3/8 in Number of Teeth 13 Outside Diameter 5.82 in Pitch Diameter 5.224 in Bore Type Plain Chain Number 100 Finish Black Oxide Hub Diameter 3 7/8 in Hub Projection 0.933 in Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 1 5/8 in Number of Set Screws 0 Set Screw Location Not Applicable