Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FI21.72AGB 350MM PN2 found under Bearing Ball Annular by Naf Ab. The National Stock Number assigned to this part is 3110014296580, 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 FI21.72AGB 350MM PN2.