Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 11552-018 found under Body Valve by Ametek Thermal Systems Inc. The National Stock Number assigned to this part is 4810013479366, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 11552-018.