Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1159CS20639-9 found under Seal Assy Rh Side by Gulfstream Aerospace Corp. The National Stock Number assigned to this part is 5330012593254, 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 1159CS20639-9.