Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AA-B216-48D4A found under Poppet Head Assy Ai by Pall Aeropower Corporation. The National Stock Number assigned to this part is 1660012153627, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AA-B216-48D4A.