Construction fasteners: what they are, types, application

Carrying out repair and construction work requires the presence of fasteners. Their assortment is huge and is classified according to different parameters. With the help of fasteners connect small parts and fix large blocks with a serious load. At the link you can read in detail about wholesale fasteners, and below we will understand their types and features.

Types of fasteners and their characteristics

Any fasteners are produced according to the norms established in the state. Elements are of several types. Removable elements are not difficult to disassemble. Semi-permanent types of fasteners can be removed, but there are risks of damage to the fastening element. Permanent fasteners are not disassembled.

Fasteners are divided into two types. The metric ones include elements with thread pitch, namely: screws, bolts, self-tapping screws, etc. The second type is fasteners in the form of dowels, nails, anchors. Fasteners are represented by dozens of items. Products differ in shape, size, material, thread and method of fixation.

To the varieties of fasteners include:

• Self-tapping screws are metal rods with a sharp thread and a head for a screwdriver or screwdriver. There are metal and wood. They are used for fastening drywall, profiles, metal tiles, etc.
• Bolts - a cylindrical rod with a threaded male thread. It is used together with a nut. The fasteners are tightened with a wrench.
• Screws are used to connect parts with external threads. They androko used in the assembly of furniture, as it is practically invisible. This type of connection does not provide for frequent assembly and disassembly. Unlike the bolt is used as an independent fastening device. Suitable for wood, plasterboard and the connection of metal products.
• Anchors are technically complex steel products designed for high loads. Metiz is attached to bases made of concrete, natural stone, brick and other hard materials.
• Nails consist of a cap and an oblong rod. They are used for working with wood. Fasteners made of hardened steel can be hammered into brick and concrete bases.
• A rivet is an element in the form of a round rod without threads, which connects parts to each other through a hole. Rivet joints are used in structures where resistance to vibration is required.

Metalware is divided by purpose. Technical parameters should correspond to the conditions of the working environment and loads. They are used in industry, construction and in the home.

Classification of fasteners

Each part has design features. For example, rivets are spacer, lobe, nut, extractor, open and closed. Fixation is made with the help of hand and electric hammers, riveters.

Anchors are divided into hammered, frame metal, ceiling and lightweight. For their installation, a hole is created. A sleeve is installed in it, after which the fastener is hammered in.

Bolts by shape are stepped, foundation bolts, as well as with a hexagonal head. The reliability of the connection is directly related to the pressure of the bolt cap and nut to the surface of the clamped material.

Self-tapping screws and screws are subdivided by the shape of the head: countersunk, hexagonal, with a cross-shaped slot, semi-cylindrical and hemispherical. The tips are with a sharp end and in the form of a drill.

Washers, studs and screws are also used in the fastening system. A large selection helps to choose the element in accordance with the technological features, operating conditions and technical purpose. To increase the operational life of the parts are coated with an anti-corrosion coating. To choose a quality reliable fastener, pay attention to the features of the material, allowable loads, resistance to chemical and mechanical influences.