Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R-3603 1 1 4IDX found under Tubing Nonmetallic by Saint Gobain Performance Plastics. The National Stock Number assigned to this part is 4720010877093, 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 R-3603 1 1 4IDX.