Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3393197-505 found under Valve Assy Mixing by Boeing Company The. The National Stock Number assigned to this part is 1660003968419, 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 3393197-505.