Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1139 found under Bumper Valve Suctio by Smith E L And Sons Co. The National Stock Number assigned to this part is 4310011223551, and the Federal Supply Class is 4310 Compressors And Vacuum Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1139.