>> Search results for: HC101077 NSN Search Results National Stock Number (NSN) Description 4820-99-827-1997, 4820998271997 VALVE,NON RETURN 4820-99-821-9284 , 4820998219284 VALVE,NON-RETURN 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