What we do not know about self-tapping screws?

Features of different types of fastening: self-tapping screws for profile

The main advantage of a self-tapping screw is its ability to make spiral threads in the material structure. This quality has a screw. The difference lies in the fact that the screw is more intended for making holes, self-tapping screws - screw tight surfaces to each other, including metal materials, concrete structures, bricks.

Self-tapping screws are classified according to tip type:

• Semi-spherical
• Hexagon
• Hollow tip
• Semi-cylindrical

The use of the fastening type is based on the strength of the material. The quality of the building material, its strength play a fundamental role in the selection of self-tapping screws, its threads, heads and top sputtering.

Screws for profile - we use different material variants

Screws are attached to different types of profiles:

- metal

- wooden

- plasterboard sheets

Screws intended for wooden fastening have a sparse thread and sharp tip. The need to make a preliminary hole in a wooden surface is missing. The compliant structure of this profile well passes the metal rod, without destroying the circumference of the hole.

Self-tapping screws are also used for fixing gypsum board materials. Builders use them when walling, ceilings. Relatively inexpensive for physical effort fastening is reliable and easy to operate. An electric screwdriver will be an irreplaceable assistant.

Given the fact that self-tapping screws are used in most cases for finishing work, there should be a minimal trace on the surface of the wooden profile or drywall sheet and the head of the screw is slightly visible( do not be above the surface of the fixing material).

The use of such fasteners for metal profiles has its advantages. Self-tapping screws for the profile have a stainless property, they have a carbonaceous metal and an anti-corrosion coating. Mounting by such means is a reliable and long-term structure. Stainless galvanized and phosphated screws have a stainless feature.

Screws for profile - specific classification by composition, structure

Based on the above specific characteristics, self-tapping screw is used for metal profiles( thickness 0, 2 cm) and plasterboard layers.

The basic characteristics of a self-tapping screw are best considered using concrete structures:

1. Made of
2. steel. Surface coated with phosphated or oxidized
3. .
4. drill bit.
5. countersunk head. Cross head for
6. screw. Thread spiral - thick.

. Mounting of gypsum fiber on metal profiles occurs with self-tapping screws, having the following characteristics:

1. Composition - steel
2. Phosphated spraying
3. Acute tip
4. Malcare personnel head
5. average frequency

Self-threading bug used for fastening metal sections and metal bearing structures. It is used without drilling. Has the following properties:

2. steel Galvanized, oxidized spray
3. Drill bit
4. Truncated head
5. Phillips screwdriver
6. Thick thread

Press washer is a self-tapping screw for metal profiles to supporting wooden and iron structures. It is used without drilling. Product specifications:

1. Steel
2. Galvanized coating
3. Drill bit
4. Semi-spherical head
5. Cross connector
6. Thick thread

It is important to note! The choice of screws depends on the materials and function of the fastening itself. It is necessary to pay attention to the screw connector and, in accordance with this, select the attachment for drilling into the electric screwdriver.