Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UXA-8640 found under Tube Assembly Metal by Twin Disc Incorporated. The National Stock Number assigned to this part is 4710011978751, 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 UXA-8640.