>> Search results for: NT521R0440AC5 NSN Search Results National Stock Number (NSN) Description 5305-01-421-1537, 5305014211537 SCREW,MACHINE 5305-01-504-8239 , 5305015048239 SCREW,CAP,SOCKET HEAD 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