Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R902439597 found under Rotary Group by Bosch Rexroth Corporation. The National Stock Number assigned to this part is 2850016110803, and the Federal Supply Class is 2850 Gasoline Rotary Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R902439597.