Attributes . 50-3 Chain; 15 Teeth; 3 Rows of Teeth; Hardened Teeth; 3.315" Outside Dia; 3.006" Pitch Dia; B-Hub One Side; Rough Bore Mount; 5/8" Chain Pitch; ANSI Roller Chain Chain Type; No Keyway; Steel Material; 1-1/2" Max Bore . Names