Attributes . 50-3 Chain; 13 Teeth; 3 Rows of Teeth; Hardened Teeth; 2.911" Outside Dia; 2.612" Pitch Dia; B-Hub One Side; Rough Bore Mount; 5/8" Chain Pitch; ANSI Roller Chain Chain Type; No Keyway; Steel Material; 1-5/16" Max Bore . Names