Attributes . 40 Chain; 16 Teeth; 1 Row of Teeth; Hardened Teeth; 2.814" Outside Dia; 2-9/16" Pitch Dia; B-Hub One Side; Rough Bore Mount; 1/2" Chain Pitch; ANSI Roller Chain Type; No Keyway; Stainless Steel Material; 1-3/8" Max Bore . Names