Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5E972 found under Cylinder Head Diesel Engine by Chicago Pneumatic Tool Co. The National Stock Number assigned to this part is 2815009254306, 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 5E972.