Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KB2FR312-2-8840-5 found under Ring Piston by Dana Corp. The National Stock Number assigned to this part is 2815007902656, 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 KB2FR312-2-8840-5.