Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R4427-09 found under Valve Linear Directional Control by Aerocontrolex Group Inc. The National Stock Number assigned to this part is 4810016557572, 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 R4427-09.