Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F388-1057-1 found under Body Valve by Carleton Technologies Inc. The National Stock Number assigned to this part is 1660000703884, 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 F388-1057-1.