Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S4M215 found under Coupling Half Shaft by Kenworth Truck Co. The National Stock Number assigned to this part is 3010002897412, 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 S4M215.