Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K1-1-2X25 found under by Mueller Co Ltd. The National Stock Number assigned to this part is 4710002782221, 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 K1-1-2X25.