Bushed Roller Chain Sprocket For Bushing Size 2012 For Bushing Type Split Taper For Chain Pitch 5/8 in Material Steel Number of Teeth 23 Outside Diameter 4.92 in Pitch Diameter 4.59 in Chain Number 50 For Number of Strands Single Maximum Bore Diameter 2 in Finish Black Oxide Hub Diameter 3 5/8 in Hub Projection 0.907 in Hub Type One Side Length through Bore 1 1/4 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.343 in