Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18424 found under Clutch Assembly Friction by Twin Disc Incorporated. The National Stock Number assigned to this part is 3010002248314, 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 18424.