Single Strand Sprocket Bore Diameter 1 3/8 in For Chain Pitch 2 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 1 7/8 in Number of Teeth 8 Outside Diameter 6.03 in Pitch Diameter 5.226 in Bore Type Plain Chain Number 160 Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 3 1/4 in Hub Projection 1.094 in Includes Set Screws Keyway Yes Keyway Depth 1/4 in Keyway Width 1/2 in Length through Bore 2 1/4 in Material Grade 1045