>> Search results for: MC20E NSN Search Results National Stock Number (NSN) Description 7420-00-042-0889, 7420000420889 ADDING AND SUBTRACTING MACHINE 7420-01-056-3453 , 7420010563453 ADDING MACHINE 1 Related Inventory Search You can use this search box to continue searching. Search parameters can include any combination of characteristics, specifications, description, partial part numbers, NSN or other stocking number. Special characters are not needed and are automatically stripped before searching. Do you sell this part? Become part of our growing pool of certified suppliers. Send Information