Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 520 018 found under Seal Ring Labyrinth by Man Diesel And Turbo Se. The National Stock Number assigned to this part is 2835123419065, and the Federal Supply Class is 2835 Gas Turbines And Jet Engines Non-Aircraft Prime Mover Aircraft Non-Prime Mover And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 520 018.