TIMco Twin-Threaded Blackjax Screw Specification A twin-threaded woodscrew with a black japanned finish designed to be used with black ironmongery. Round Head Pozi recess for reduced cam out and round head for reliable clamping. Twin Thread 60°: Twin-threads with parallel shank for faster insertion and greater pull out resistance. 25° sharp point: The 25° sharp point and single leading thread achieves a fast start and improved thread acceptance. |