>> Search results for: 300HEATER NSN Search Results National Stock Number (NSN) Description 4520-99-137-7188, 4520991377188 HEATER,SPACE,ELECTR 4520-99-137-7416 , 4520991377416 HEATING ELEMENT,ELE 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