Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NU320M found under Bearing Ball Annular by E C C Spares And Services Electro Work. The National Stock Number assigned to this part is 3110001556358, 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 NU320M.