Attributes . 50-3 Chain; 17 Teeth; 3 Rows of Teeth; Hardened Teeth; 3-23/32" Outside Dia; 3.401" Pitch Dia; B-Hub One Side; Rough Bore Mount; 5/8" Chain Pitch; ANSI Roller Chain Chain Type; No Keyway; Steel Material; 1-7/8" Max Bore . Names