1" Bore; 3.01" Nominal Bolt Circle Diam; 4 Bolt Square Flange; Aluminum Housing; Plain; 2-1/4" Length Thru Bore; 2.13" Bolt Spacing; 2-13/16" Housing Length; 9/32" Mounting Hole Diam; No Relubricatable; FL16; Self Aligning; End Mount