Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U2-03-0039 found under Switch Microscope by Marco Ophthalmic Inc. The National Stock Number assigned to this part is 5930014733740, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like U2-03-0039.