Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P523869 found under Valve Flow Control by Fmc Technologies Inc. The National Stock Number assigned to this part is 4820016721968, 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 P523869.