Attributes . 4 Bolt Round Flange Cartridge; 2" Bore; 6-1/2" Bolt Circle; 4-19/32" Bolt Spacing; 1 Piece Solid; Tapered Adapter Sleeve Mount; Ductile iron; Spherical Roller Bearing; 1.575" Length Thru Bore; Relubricatable; Single Lip Contact Contour Riding Seal . Names