Bushed Roller Chain Sprocket For Bushing Size 1610 For Bushing Type Split Taper For Chain Pitch 5/8 in Material Steel Number of Teeth 20 Outside Diameter 4.32 in Pitch Diameter 3.995 in Chain Number 50 For Number of Strands Single Maximum Bore Diameter 1 5/8 in Finish Black Oxide Hub Diameter 3 1/4 in Hub Projection 0.657 in Hub Type One Side Length through Bore 1 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.343 in