Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DB-1231 found under Cooler Lubricating Oil Engine by Dunham Bush Ltd. The National Stock Number assigned to this part is 2930014234349, and the Federal Supply Class is 2930 Engine Cooling System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DB-1231.