Generally refers to pointed, coarse-toothed, hard-textured wood screws, but also aluminum alloy and plastic. A special self-tapping screw used to thread metal holes is called a tap.

Self-tapping screws are used for non-metallic or soft metals, and do not need to drill and tap; self-tapping screws are pointed, so that they can “self-tapping”; ordinary screws are flat-headed and have the same thickness.

Self-tapping screw means: The drilled hole is a hole that does not need to be tapped. The screw used is different from the general ones.

The head is pointed and the pitch is relatively large. It is a bit like a chipless tap, and it can be directly screwed in without tapping. , Metals and plastics usually use this method.

It can “tap-drill, squeeze, and press” the consolidated body into corresponding threads on the material to be consolidated by its own threads, so that they can be closely matched with each other.

Self-tapping screws are very common in life. They can also be called quick-thread screws. One of its great features is that it does not require a nut to match and use at the same time, and it can be fastened by its own thread.

However, many people don’t know what tool to use to tighten the screw after purchasing this kind of screw. Here is a brief introduction.

Tightening method of self-tapping screws:

Generally speaking, the tools used for self-tapping screws are gun drill, air screwdriver, screwdriver, etc., but if you need to use the cement wall, then you need to use an electric hammer.

Some concrete walls are not suitable for the use of ordinary screws, especially the high load-bearing wall, you need to use expansion pipes and self-tapping screws to fix.

Knowing its characteristics when using self-tapping screws can be better used. It is not suitable for direct use on the wall.

It is not recommended to use bare hands when the wall is driven in. It is necessary to use a gun drill to drill the hole on the wall now. Match the plastic expansion tube, and then screw in the screw.

If it is a normal wood and a material with low hardness, you can directly drive it in without punching, because the screw itself is pointed. Pay attention to the straight line and mark the position where the screw needs to be screwed, so as not to be crooked and affect the overall appearance degree.

What should I do if the screw needs to be taken out if it is crooked when tightening it?

This is a trouble for many people when they encounter this kind of problem. In fact, it can be solved by a simple trick.

Take a rubber band, put it on the screw and use a screwdriver to press it to rotate. The self-tapping screw can easily rotate. It can be taken out.