Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 165.05.0004 found under Insert Heat Exchan by Jenoptik Advanced Systems Llc. The National Stock Number assigned to this part is 2815123463671, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 165.05.0004.