Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DR20-231 315YM 5 found under Valve Regulating Fluid Pressure by Bosch Rexroth Corporation. The National Stock Number assigned to this part is 4820012493456, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DR20-231 315YM 5.