Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BUS 1 2X3 4 PIPE found under Pipe Metallic by Kalyn Siebert I Inc. The National Stock Number assigned to this part is 4710015477292, 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 BUS 1 2X3 4 PIPE.