Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1000-0021 found under Bearing Ball Annula by Lilbern Design Of Virginia Llc. The National Stock Number assigned to this part is 3110012539689, 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 1000-0021.