Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12689 found under Spring Valve by Dresser Rand Co. The National Stock Number assigned to this part is 2805009639763, and the Federal Supply Class is 2805 Gasoline Reciprocating Engines Except Aircraft And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12689.