>> Search results for: XX5500000 NSN Search Results National Stock Number (NSN) Description 4310-01-247-7632, 4310012477632 VACUUM PUMP UNIT,RECIPROCATING 4320-21-898-0766 , 4320218980766 PUMP UNIT,VACUUM-PR 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