Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RT21243-3 found under Bearing Ball Annular by Hispano Suiza Groupe Safran. The National Stock Number assigned to this part is 3110142187819, 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 RT21243-3.