Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B5304 found under Hub Clutch by Twin Disc Incorporated. The National Stock Number assigned to this part is 3010000016187, 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 B5304.