Roller Chain Sprocket; 1-15/16" Bore; 60 Chain; 21 Teeth; 1 Row of Teeth; No Hardened Teeth; 5.426" Outside Diameter; 5.033" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 3/4" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material