Attributes . 6 Bolt Round Flange Block; 4-7/16" Bore; 11.8" Bolt Circle; 5-7/8" Bolt Spacing; 1 Piece Solid; Concentric Collar Mount; Cast Iron; Tapered Roller Bearing; 6-3/4" Length Thru Bore; Relubricatable; Double Lip Radial Seals . Names