Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 509E208AF-1 found under Bearing Sleeve by General Electric Inc. The National Stock Number assigned to this part is 3120007659817, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 509E208AF-1.