Wood screws are also similar to machine screws, but the thread on the screw is a special wood screw thread, which
can be directly screwed into the wooden component (or part) to connect a metal (or non-metal) part with a through 
hole with A wooden component is firmly connected together. This connection is also a detachable connection.
This is a nail designed specifically for wood. After entering the wood, the wood screw will be embedded in it very 
firmly. If the wood is not decayed, it is impossible to pull out, even if it is pulled out forcibly, it will bring out the 
nearby wood. One more thing to pay attention to, wood screws must be screwed in with a screwdriver. Never knock 
them in with a hammer, as it will damage the surrounding wood. The advantages of wood screws are that they have
stronger consolidation capabilities than nailing, and can be removed and replaced, and they are less damaging to 
the wood surface and are more convenient to use.
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 depending on the nail head. The nail head is divided into two types: slot screw and cross recessed
screw, generally round Head screws are made of mild steel and are blue. Flat head screws are polished. Oval head 
screws are usually plated with cadmium and chromium. They are often used to install loose leaves, hooks and other
hardware accessories. The specifications are determined by the rod diameter, length and nail head type, and the unit 
is the box at the time of purchase.
2. Mounting wood screw tool Screwdriver is its loading and unloading tool. The shape matches the groove shape of 
the wood screw head. There are two types: one-shaped and cross-shaped; in addition, there is a special screwdriver 
installed on the bow drill, which is suitable for loading and unloading larger wood screws. It is more convenient and
labor-saving.
Self-tapping screws have high hardness, wide thread spacing, deep threads, and non-smooth surface. Wood screws 
are the opposite. The other difference is more obvious. There is no thread in the back section of wood screws. 
Wood screws are thin, blunt and soft. The thread of self-tapping screws is thick, sharp and hard.