Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 128 0042 020 found under Microphone Capacito by Rockwell Collins Inc. The National Stock Number assigned to this part is 5965013200260, 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 128 0042 020.