Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9542QH-3 8 found under Valve Plug by Festo Corporation. The National Stock Number assigned to this part is 4820123009253, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9542QH-3 8.