Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E2500-25 found under Guide Valve Stem by Dresser Rand Group Inc. The National Stock Number assigned to this part is 4820013101025, 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 E2500-25.