Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 45731-1341 found under Cooler Lubricating Oil Engine by Irl Thermal Systems Ltd. The National Stock Number assigned to this part is 2935014375213, and the Federal Supply Class is 2935 Engine System Cooling Components Aircraft Prime Moving. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 45731-1341.