>> Search results for: TF4R21YY NSN Search Results National Stock Number (NSN) Description 5950-00-167-6251, 5950001676251 TRANSFORMER,AUDIO FREQUENCY 5950-01-086-6176 , 5950010866176 TRANSFORMER,AUDIO FREQUENCY 5950-00-989-9828, 5950009899828 Cancelled -> Replaced by 5950011832848 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