>> Search results for: B1620A11 NSN Search Results National Stock Number (NSN) Description 5315-01-182-8448, 5315011828448 PIN 4820-01-049-9254 , 4820010499254 VALVE,CHECK 4820-01-444-2322, 4820014442322 VALVE,CHECK 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