Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P5502-6 found under Diaphragm Air Shuto by Superior Valve Co. The National Stock Number assigned to this part is 1660004492158, 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 P5502-6.