>> Search results for: RK23191 NSN Search Results National Stock Number (NSN) Description 6635-01-663-7804, 6635016637804 METER,DENSITY,DIGITAL 2990-01-668-2976 , 2990016682976 SENSOR,SPECIAL 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