>> Search results for: MARINITEML NSN Search Results National Stock Number (NSN) Description 5640-21-897-7974, 5640218977974 INSULATION BOARD,TH 5640-21-897-7977 , 5640218977977 INSULATION BOARD,TH 5640-21-897-7975, 5640218977975 INSULATION BOARD,TH 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