Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E420SHKPRPC21 found under Tubing Nonmetallic by Ernst John C And Co Inc. The National Stock Number assigned to this part is 4710000871644, and the Federal Supply Class is 4710 Pipe Tube And Rigid Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E420SHKPRPC21.