>> Search results for: B21168 NSN Search Results National Stock Number (NSN) Description 4820-01-200-8666, 4820012008666 SEAT,VALVE 4730-00-391-8422 , 4730003918422 SEAT AND GASKET 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