Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M2059A found under Ring Set Piston by Twin Disc Incorporated. The National Stock Number assigned to this part is 2815000017813, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M2059A.