Bushed Roller Chain Sprocket For Bushing Size 2517 For Bushing Type Split Taper For Chain Pitch 1 3/4 in Material Steel Number of Teeth 12 Outside Diameter 7.581 in Pitch Diameter 6.762 in Chain Number 140 For Number of Strands Single Maximum Bore Diameter 2 1/2 in Finish Black Oxide Hub Diameter 4 1/4 in Hub Projection 0.826 in Hub Type One Side Length through Bore 1 3/4 in Standards ANSI B29.1 BIS Teeth Heat Treatment Not Hardened Tooth Width 0.924 in