Finished Bore with Keyway & SS Bore Sprocket, 50 Chain Size, 3/4 Bore Dia., 21 # of Teeth, Tritan, Mfr#: 50BS21H X 3/4

Sprocket, Bore Diameter 3/4 in, For Chain Pitch 5/8 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 3/4 in, Number of Teeth 21, Outside Diameter 4.52 in, Pitch Diameter 4.194 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 Depth 3/32 in, Keyway Width 3/16 in, Length through Bore 1 in, Number of Set Screws 2