Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B11.50006-0490-517.155 found under Bearing Plain Spher by Man B And W Diesel Ltd. The National Stock Number assigned to this part is 3120123817590, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B11.50006-0490-517.155.