Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H-3503 found under Diaphragm Steam Tur by Siemens Demag Delaval Turbomachi. The National Stock Number assigned to this part is 2825011682027, and the Federal Supply Class is 2825 Steam Turbines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like H-3503.