>> Search results for: 1L590 NSN Search Results National Stock Number (NSN) Description 4820-00-866-4433, 4820008664433 VALVE,REGULATING,FLUID PRESSURE 5120-99-136-4171 , 5120991364171 SOCKET,SOCKET WRENC 4820-21-884-1043, 4820218841043 VALVE,REGULATING,FL 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