The so-called wood screw, that is, a wood screw, is similar to a machine screw, but the thread on the screw rod is a special wood screw rib, which can be directly screwed into a wooden component, used to connect a metal or non-metallic part with a through hole to the screw. A wooden element is fastened together. Self-tapping screws generally refer to pointed, coarse teeth, and hard wood screws, and are also used for aluminum alloys and plastics. Today, let's take a look at the difference between wood screws and self-tapping screws? What are the specifications and sizes of wood screws?
wood screw size
This is a nail specially designed for wood, and after entering the wood, it will be firmly embedded in it. If the wood is not corrupted, it is impossible to pull it out, and even if it is pulled out forcibly, it will bring out the wood. Another point to note is that the wood screws must be screwed in with a screwdriver, do not knock them in with a hammer, which will damage the surrounding wood.
There are several types of wood screws, such as cross-recessed countersunk head, cross-recessed semi-recessed head, cross-recessed round head, slotted (slotted) countersunk head, slotted semi-recessed head, slotted round head, hexagonal head, etc., with a nominal diameter of 1.6, 2, 2.5, 3, 3.5, 4, 5, 6, 7, 8, 10 and other series, with lengths of 6, 8, 10, 12, 16, 20, 25, 30 and other series (not all listed, these are more commonly used) .
The advantages of wood screws are that the consolidation ability is stronger than that of nails, and they can be removed and replaced, which is more convenient to use without damaging the wood surface.
1. The common types of wood screws are iron and copper. The types are divided into round head type, flat head type and oval head type according to different nail heads. There are two types of slotted screws and cross recessed screws on the nail head. The head screws are made of mild steel and are blue, the flat head screws are polished, and the oval head screws are usually cadmium chrome plated, and are often used to install loose-leaf, hook and other hardware accessories.
2. Tools for installing wood screws The screwdriver is a tool for loading and unloading. The shape of the wood screw head is slot-shaped and there are two types: a word and a cross. In addition, there is a special screwdriver installed on the bow drill, which is suitable for loading and unloading larger wood screws. More convenient and labor-saving.