UCF-204 FYH Square Flanged Bearing 20mm inner Diameter Mounted BearingUCF 204 FYH Bearing Square Flanged Mounted Bearing Cylindrical bore (with set screws) 20mm Inner Diameter This heavy duty four bolt flange unit has a round cartridge on the backside of the flange which allows for precise mounting and alignment. Applications are Rotating drum, rotating roller and when precise mounting accuracy is required UCF 204 Bearing Four bolt Flanged Bearing Bolt Size: M10 Basic Load (Cr): 12. 8 KN Basic Load (Cor): 6. 65 KN