Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XXBNN563491 found under Roller Bearing Extr by Fairbanks Morse Llc. The National Stock Number assigned to this part is 2815015643600, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like XXBNN563491.