The screw is a tool to tighten the machine parts step by step by using the physical and mathematical principles of the oblique circular rotation and friction of the object. Screw is a general term for fasteners, which is spoken daily. Screws are indispensable industrial necessities in daily life: such as minimal screws used in cameras, glasses, clocks and watches, electronics and so on; general sc...

The difference between self-drilling screw, self-drilling screw, self-tapping screw and self-tapping self-drilling screw: First of all, the same products can be divided into two categories: .1. Drilling tail screw = self-drilling screw = self-tapping self-drilling screw < br />.2. Self tapping screw The first kind of screw has its own drill tail, when it is screwed into steel plate and wood, no pr...

Self-drilling self-tapping screw is a new type of high-efficiency riveting fastener; self-drilling self-tapping screw is named self-drilling self-tapping screw because of its tail, also known as self-drilling tail screw, drilling tail screw, drilling tail screw, self-drilling self-tapping screw, self-drilling self-tapping self-drilling tail screw, etc. The implementation standards of self-drilling...