Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 525 12500 1 found under Tube Assembly Metal by Boeing Aircraft. The National Stock Number assigned to this part is 4710014127570, 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 525 12500 1.