>> Search results for: AY4012A NSN Search Results National Stock Number (NSN) Description 5990-00-557-8573, 5990005578573 SYNCHRO,TRANSMITTER 5990-00-683-0020 , 5990006830020 SYNCHRO,TRANSMITTER 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