Attribute Value: 60-2 Chain; 76 Teeth; 2 Rows of Teeth; No Hardened Teeth; 18.584" Outside Dia; 18.149" Pitch Dia; C-Hub Both Sides; Rough Bore Mount; 3/4" Chain Pitch; ANSI Roller Chain Type; No Keyway; Steel Material; 3-5/16" Max Bore . Names (Page 1)