Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X15-B2778 found under Valve Reed by Rix Industries. The National Stock Number assigned to this part is 4310012979299, 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 X15-B2778.