Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9L4055 found under Pump Cooling System Engine by Caterpillar Inc. The National Stock Number assigned to this part is 2930004873422, 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 9L4055.