Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X20-18-XZILON-3AECI found under by Granitize Products Inc. The National Stock Number assigned to this part is 7930016634493, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like X20-18-XZILON-3AECI.