Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H320U found under Headset Microphone by Joint Electronics Type Designation. The National Stock Number assigned to this part is 5965004997185, 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 H320U.