Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AFL 23 found under Filter Element Air Conditioning by Mahr Federal Inc. The National Stock Number assigned to this part is 1660016632680, 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 AFL 23.