Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B297328 found under Bearing Half Sleeve by Rolls Royce Marine North America. The National Stock Number assigned to this part is 3120997867577, 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 B297328.