>> Search results for: 51221173 NSN Search Results National Stock Number (NSN) Description 4820-01-388-1165, 4820013881165 VALVE ASSEMBLY 4210-99-717-9922 , 4210997179922 FIREWIRE ELEMENT AS 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