Zhuocheng Slotted Countersunk Self taping Screw

There are several variations of head styles, especially on screws, but the two main types are countersunk and non-countersunk heads. The countersunk screw head appears evenly or flat within the material's surface. Some types can be buried and hidden in the assembly, allowing a clean and smooth fastening.

Self tapping screws are mostly used when the medium into which it will be screws is something like metal. Although, self tapping screws are also used to drill wooden and plastic materials. They tend to have a sharp point, and the threads are also sharp to act like knives cutting into any kind of medium.

Wedge Lock washers are a favourite in transportation industries such as automotive and aerospace. You'll also find them in household white goods. These washers aren't just functional, but also aesthetically pleasing. Use these washers to allow countersunk screws to be installed flush with the surface of an object.