Bushed Roller Chain Sprocket For Bushing Size 1610 For Bushing Type Split Taper For Chain Pitch 1/2 in Material Steel Number of Teeth 28 Outside Diameter 4.74 in Pitch Diameter 4.466 in Chain Number 40 For Number of Strands Single Maximum Bore Diameter 1 5/8 in Finish Black Oxide Hub Diameter 3 in Hub Projection 0.716 in Hub Type One Side Length through Bore 1 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.284 in