Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H2220PC135ANDH2221PC155-164 found under Seal Ring Assembly Labyrinth by Lowe Charles Co The. The National Stock Number assigned to this part is 2825007835524, 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 H2220PC135ANDH2221PC155-164.