>> Search results for: MODEL4200 NSN Search Results National Stock Number (NSN) Description 6520-01-491-7897, 6520014917897 DENTAL OPERATING UNIT 6520-01-493-3759 , 6520014933759 DENTAL OPERATING UNIT 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