Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LM4009 found under Valvecheck by General Electric Co. The National Stock Number assigned to this part is 4820016778906, 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 LM4009.