Roller Chain Sprocket; 7/8" Bore; 50 Chain; 16 Teeth; 1 Row of Teeth; No Hardened Teeth; 3.517" Outside Diameter; 3.204" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 5/8" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material