Lag bolt comprises machine thread, which is formed on shank between hexagon head and wooden thread, where diameter of machine thread is larger than diameter of wooden thread

摘要

The lag bolt comprises a machine thread, which is formed on the shank between a hexagon head and a wooden thread. The diameter of the machine thread is larger than the diameter of the wooden thread. A screw nut is guided problem-free through the wooden thread fitted to the machine thread.