Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5H5508 found under Propeller Shaft With Universal J by Caterpillar Inc. The National Stock Number assigned to this part is 3010009217249, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5H5508.