Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20649 found under Stem Fluid Valve by Real Time Laboratoriesllc. The National Stock Number assigned to this part is 4810012295519, 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 20649.