Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 819D121-23 found under Indicator by Dresser Rand Co. The National Stock Number assigned to this part is 2825010937662, 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 819D121-23.