Finished Bore with Keyway & SS Bore Roller Chain Sprocket, 80 Chain Size, 12 # of Teeth, Tritan, Mfr#: 80BS12H X 1 5/8

Roller Chain Sprocket, Bore Diameter 1 5/8 in, For Chain Pitch 1 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 1 5/8 in, Number of Teeth 12, Outside Diameter 4.33 in, Pitch Diameter 3.864 in, Bore Type Fixed, Chain Number 80, Finish Black Oxide, Hub Diameter 3 1/8 in, Hub Projection 1.05 in, Includes Set Screws, Keyway Yes, Keyway Width 3/8 in, Length through Bore 1 5/8 in, Number of Set Screws 2