Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SIN-132-8 111021 AT-871R found under Microphone Table by Tandberg Data Corporation. The National Stock Number assigned to this part is 5965015442759, 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 SIN-132-8 111021 AT-871R.