Bushed Roller Chain Sprocket For Bushing Size 3020 For Bushing Type Split Taper For Chain Pitch 1 1/4 in Material Steel Number of Teeth 30 Outside Diameter 12.643 in Pitch Diameter 11.958 in Chain Number 100 For Number of Strands Single Maximum Bore Diameter 3 in Finish Black Oxide Hub Diameter 5 1/4 in Hub Projection 1.308 in Hub Type One Side Length through Bore 2 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.692 in