The difference between self-tapping screws and ordinary screws

The top packaging of EVP company’s large vacuum pump(such as liquid ring vacuum pump, roots vacuum pumps, rotary piston vacuum pump, etc.) adopts the form of self-tapping screws, which is very conducive to the user or dealer to open the box, and the export goods using this screw is also convenient for the customs to open the box inspection so as not to cause packaging damage because of unpacking difficulties!

There are many types of screws, such as self-tapping, ordinary screws are the two commonly used, then the difference between self-tapping screws and ordinary screws, detailed as follows:

First, what are the differences between self-tapping screws and ordinary screws ?

1.Difference in nature.

Self-tapping screws, that is, screws with bricks, can be constructed using special electric facilities and equipment, so that drilling, fixing, and locking construction can be completed together, which is very simple. Ordinary screws are just common, as long as they are not shaped screws, they are considered ordinary screws.

2.Differences in characteristics.

The self-tapping screw can be used on the item to be installed, using its own thread to extrude the same thread on the installation, so as to better fit together. This connection is relatively tight, and it is not easy to loosen. And ordinary screws, are flat head design, the thickness of the state is the same, in use, need to have the screw eye, and tapping teeth, in order to achieve better results.

3.the difference in use.

Self-tapping screws are generally used in non-metal, or soft metal, without the need to punch the bottom hole, or tapping. Ordinary screws need to be punched, and they also need to be tapped. It is often used on hard non-metals or metals.

Second, what should we pay attention to when using stainless steel screws

1, when the stainless steel screws in the storage time, it is necessary to do a good job of protection, to avoid quality problems, affecting the quality of use.

2, stainless steel screws in the process of handling, to ensure that the light handling, to prevent too much shaking, resulting in friction of the screw fasteners, resulting in unnecessary damage.

3, when purchasing stainless steel, try to cooperate with big brand businesses, so as to prevent screw quality problems, avoid unnecessary trouble.