Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20618 2 found under Tubing Flexible by A Vox Systems Inc. The National Stock Number assigned to this part is 4720009428466, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 20618 2.