Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1KDDFS20166B found under Bearing Ball Annular by Timken Company The. The National Stock Number assigned to this part is 3110001559640, 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 S1KDDFS20166B.