Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 981-000271 found under by Environmental Service And Equipment. The National Stock Number assigned to this part is 5965016003283, 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 981-000271.