Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1K8938 found under Piston Clutch Shaft by Caterpillar Inc. The National Stock Number assigned to this part is 2520010353464, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1K8938.