Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 420 830 270 found under Gasket by Bombardier Aerospace. The National Stock Number assigned to this part is 5330012234336, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 420 830 270.