Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SER57385-64ITEM15 found under Bearing Ball Annular by Roth Tank Co. The National Stock Number assigned to this part is 3110001091156, 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 SER57385-64ITEM15.