Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R3603 3 16IDX5 16OD 9INLG found under Tubing Nonmetallic by Saint Gobain Performance Plastics. The National Stock Number assigned to this part is 4720011794377, 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 R3603 3 16IDX5 16OD 9INLG.