Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4L2023 found under Radiator Engine Coo by Caterpillar Inc. The National Stock Number assigned to this part is 2930009332739, 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 4L2023.