The tail of the drill tail screw is in the shape of drill tail or sharp tail, which can directly drill holes in the setting material and basic material without auxiliary processing. Tapping and locking can greatly save construction time. Compared with ordinary screws, it has higher toughness and retention, and will not loosen after long-term combination. It is simple to use safe drilling and tapping to complete the operation at one time.
Spiral characteristics
Screw is a tool to tighten instruments and parts step by step by using the physical and mathematical principles of circular rotation and friction of the inclined plane of an object. Drill tail screw is a kind of screw with a self-tapping bit at the front end of the screw.
Screw is the same invention in people's production and life for thousands of years. According to the application field, it is the first invention of mankind. Self-drilling screw is a new invention of people in recent years, also called self-drilling screw. Screw is a general term for fasteners.
It is a kind of screw, which is mainly used for fixing the color steel tile of steel structure, and can also be used for fixing the thin plate of simple building. It cannot be used for metal-to-metal bonding.