>> Search results for: M120556 NSN Search Results National Stock Number (NSN) Description 2990-01-372-5589, 2990013725589 MUFFLER,EXHAUST 2990-01-454-4337 , 2990014544337 Cancelled -> Replaced by 2990013725589 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