Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BT10U299 found under Ring Piston by Spx Corp. The National Stock Number assigned to this part is 2815005183561, 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 BT10U299.