Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FB219821 found under Bearing Ball Annular by Rollsroyce Airlines. The National Stock Number assigned to this part is 3110004687949, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FB219821.