>> Search results for: 1B442492 NSN Search Results National Stock Number (NSN) Description 6665-99-225-3971, 6665992253971 ENVIRONMENTAL CAP 6665-21-904-3234 , 6665219043234 ENVIRONMENTAL CAP 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