Cross recessed countersunk head wood screws. The screw […]
Cross recessed countersunk head wood screws. The screw thread on the screw is a special rib for wood screws. It can be directly screwed into a wooden component (or part). Tightly connected together. This connection is also a detachable connection. The earliest technology of the screw is the turning process. However, due to the relatively large diameter of the turning process, the process was later improved by the navigation mark company through testing and named the shrink rod process. This process reduced the raw materials by 20%, and the threads were sharper and embedded in the wood. Make the wood less likely to break. At the same time, the use efficiency is improved during use, and the labor cost is reduced.