OTR: HC34024 
Includes: gasket and stainless steel bolts and lock washers.
 
Bolt Circle Diameter (bolt on): 4.50 in
Flange Outer Diameter: 5.25 in
Inside Depth: 1.00 in
Flange Inner Diameter: 3.00 in
Fits 2015 Cascadia
 
Cross references 
AL-KO KOBER CORP DIV OF HAYES AXLE: SB358
AUTOMANN: 18010622
DAYCO: 9904
OTR: HC34024
SKF: 1612B
STEMCO: 30340243434024
Loc: Shelf: Level: Bin: