Roller Chain Sprocket Bore Diameter 3/8 in For Chain Pitch 1/4 in For Number of Strands Single Hub Type No Hub Material Steel Maximum Bore Diameter 1 in Number of Teeth 32 Outside Diameter 2.688 in Pitch Diameter 2.312 in Bore Type Plain Chain Number 25 Finish Black Oxide Hub Diameter Not Applicable Hub Projection Not Applicable Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 1/8 in Number of Set Screws 0 Set Screw Location Not Applicable