Finished Bore with Keyway & SS Bore Roller Chain Sprocket, 50 Chain Size, 23 # of Teeth, Tritan, Mfr#: 50BS23H X 1 3/8

Roller Chain Sprocket, Bore Diameter 1 3/8 in, For Chain Pitch 5/8 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 1 3/8 in, Number of Teeth 23, Outside Diameter 4.92 in, Pitch Diameter 4.59 in, Bore Type Fixed, Chain Number 50, Finish Black Oxide, Hub Diameter 3 in, Hub Projection 0.657 in, Includes Set Screws, Keyway Yes, Keyway Width 5/16 in, Length through Bore 1 in, Number of Set Screws 2