FYH Bearing UCF313-40 2 1/2 Square Flanged Mounted BearingsUCF313 40 FYH Bearing Square Flanged Mounted Bearing Cylindrical bore (with set screws) 2 1 2" 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. Item: UCF313 40 Bearing Type: Four bolt Flanged Bearing Bolt Size: 3 4" inch Basic Load (Cr): 92. 7 KN Basic