Attributes . 50-2 Chain; 112 Teeth; 2 Rows of Teeth; No Hardened Teeth; 22.651" Outside Dia; 22.284" Pitch Dia; B-Hub One Side; Rough Bore Mount; 5/8" Chain Pitch; ANSI Roller Chain Type; No Keyway; Steel Material; 3-5/16" Max Bore . Names