>> Search results for: 51SIZE4 NSN Search Results National Stock Number (NSN) Description 4730-00-427-8491, 4730004278491 FLANGE,PIPE 4730-01-242-5381 , 4730012425381 Cancelled -> Replaced by 4730008265159 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