UCFA202-10 Black Oxide Plated Insert Flange Cartridge Bearing Unit 5/8" Bore Mounted BearingUCFA202 10 Black Oxide Plated Insert Flange Cartridge Unit 5 8" Inner Diameter UCFA202 10 Black Oxide Plated Insert Flange Cartridge Unit, the inner Diameter is 5 8" inch. Black oxide has certain properties and characteristics that makes it ideal for certain applications. It is used to add corrosion resistance and for appearance UCFA202 10 Black Oxide Plated Insert Bearing Flange Cartridge Unit Basic Load (Cr): 12. 8 KN Basic Load (Cor): 6. 65 KN Bolt