"B" Type Hub 5/8" Bore. P5256 pattern.

Steel plated "B" type hubs are 2-1/4" OD by 1/2" thick, and have a 1" raised shoulder surrounding the bore for added stability. 5/8" bore with a 3/16" keyway and opposed set screw hole. 3 hole bolt pattern drilled on a 1-11/16" circle to fit a P5256 sprocket pattern.