>> Search results for: 172B4551P1 NSN Search Results National Stock Number (NSN) Description 5340-01-256-2961, 5340012562961 PLUG,VENT 4730-01-479-3683 , 4730014793683 RESTRICTOR,FLUID FLOW 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