Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 158C002-1 UNVENTED found under Microphone Element by Oai Electronicsllc. The National Stock Number assigned to this part is 5965011255367, 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 158C002-1 UNVENTED.