The AndyMark HD Nub, 6mm D Bore, Double Boss XL is designed for high-torque applications, providing a robust connection between two shafts. This innovative component features pre-threaded attachment points, ensuring a secure and high-strength connection. The flat sides of the D-bore are precisely aligned with the setscrew side, optimizing torque transfer by allowing the setscrew to press the shaft's flat side into the nub's flat surface. Constructed from durable aluminum, this nub is engineered for reliability and performance in demanding mechanical environments.