Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 646-00001 found under Loudspeaker Electro by Datron Inc. The National Stock Number assigned to this part is 5965012585328, and the Federal Supply Class is 5965 Headsets Handsets Microphones And Speakers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 646-00001.