>> Search results for: B303664 NSN Search Results National Stock Number (NSN) Description 1660-01-499-4958, 1660014994958 HEAT EXCHANGER,AIR TO AIR,AIRCRA 1660-01-499-4958 , 1660014994958 HEAT EXCHANGER,AIR 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