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Permanent Fasteners – Types and Uses

Fastening two materials together is a common requirement in many manufacturing and construction processes. Whether it is a metal frame, concrete wall, or textile item, fastening plays a crucial role in ensuring its durability, safety, and functionality. While there are many types of fasteners that can be used for this purpose, not all of them can create a permanent bond that can withstand the stresses of time, wear, and environmental factors. In this blog post, we will explore six types of permanent fasteners that are widely used in various industries and applications. By understanding their characteristics, benefits, and drawbacks, you can make an informed decision about which one to use for your project.

What is Permanent Fasteners?

Permanent fasteners give a solution that is more or less inflexible. They cannot be deleted without inflicting suffering to the program once they have been installed, even by the person who originally installed them. Permanent screws are sometimes known as “one-way screws” because they have a head that can only turn one way, allowing them to be screwed in but not unscrewed.

Permanent fasteners or fixes are generally implemented to prevent interference or deletion in some applications, such as park sculptures or seats, which are supposed to stay in place for everyone’s benefit.

Types of Permanent Fasteners


Adhesives are substances that can bond two surfaces together by filling the microscopic irregularities and forming a chemical or mechanical grip. Adhesives can be made from natural or synthetic materials and can have different properties, such as viscosity, curing time, strength, and resistance to heat, water, and chemicals. The advantages of adhesives are that they can create a strong, flexible, and uniform bond over a large surface area, and they can join dissimilar and irregular materials. The disadvantages are that they can be messy to apply and can require careful preparation, curing, and handling. Examples of adhesives are epoxy, cyanoacrylate, and silicone.


Welding is a process of joining metals by heating them to their melting point and allowing them to solidify into a single piece. Welding can use different sources of heat, such as electricity, gas, or laser, and can produce different types of joints, such as butt, lap, or fillet. Welding can create a permanent and strong bond that can withstand high loads and vibrations, and can have a smooth and clean appearance. However, welding requires skilled operators, specialized equipment, and safety precautions, and can produce fumes, sparks, and heat that can pose hazards to the operator and the environment.


Riveting is a process of joining two materials by inserting a metal pin or rod called a rivet through a hole in both materials and then deforming the end of the rivet to form a head. Riveting can create a strong and durable joint that can resist shear and tensile forces and can have a decorative or functional appearance. Riveting can be done with manual or automated tools and can join various materials, such as metals, plastics, or fabrics. However, riveting can require precise drilling, alignment, and access to both sides of the materials, and can produce noise and vibration.


Bolting is a process of joining two materials by inserting a bolt through a hole in both materials and then tightening a nut on the end of the bolt to apply pressure and create a clamping force. Bolting can create a strong and adjustable joint that can be disassembled and reassembled without damaging the materials. Bolting can use different types of bolts, such as hex, carriage, or socket head, and can require specialized tools, such as wrenches or sockets. However, bolting can require ample space and access, can cause stress concentration around the holes, and can produce corrosion and fatigue over time.


Soldering is a process of joining two metals by heating them and applying a filler metal that melts at a lower temperature and flows between the surfaces. Soldering can create a permanent and leak-proof joint that can have a low electrical resistance and a decorative appearance. Soldering can be done with manual or automated tools and can use different types of filler metals, such as tin-lead, silver, or copper. However, soldering can require a clean and flat surface, can produce toxic fumes and flux residue, and can be unsuitable for high-temperature or high-stress applications.


Screwing is a process of joining two materials by inserting a screw through a hole or into a thread in one material and then turning the screw to create a clamping force that compresses the two materials together. Screwing can create a simple and fast joint that can be adjusted and removed without special tools. Screwing can use different types of screws, such as wood, machine, or self-tapping, and can join various materials, such as wood, metal, or plastic. However, screwing can create stress concentration around the hole or thread, can strip the threads or break the screw if overtightened, and can cause corrosion and loosening over time.

Applications of Fasteners:

Fasteners are widely used today because they provide a larger value than alternative connecting methods. In truth, fasteners may be used in practically all industrial applications; however, some considerations must be made. Consider the following points:


  • The load applied to the fastener
  • The fastener’s stiffness
  • The quantity of fasteners necessary must also be considered.

Some factors must be considered while selecting a fastener for a certain application. These are some of them:


  • Temperature, possibly corrosive materials, and water exposure may occur during the installation procedure.
  • Restrictions on weight.

Assembling materials

Fasteners are used in a variety of places around us, including chairs, tables, stools, doors, windows, cooking utensils, and electrical gadgets. Automotive, aviation, agricultural equipment, marines, and other sectors utilize fasteners extensively. In truth, fasteners are constantly taken into account while dealing with equipment.

For permanent fastening, the procedures listed below are utilized.

  • Brazing: It’s similar to soldering, except the joints are stronger. It’s known as hard solder. Copper and zinc make up the majority of it. Silver is sometimes used to increase soldering quality.
  • Welding: Welding is the process of melting two or more metal pieces to fusion temperature and connecting them together. Pressure may be exerted or not, depending on the situation.

Welding is divided into the following categories:

  • Pressure or Plastic Welding
  • Fusion Welding or Non-Pressure Welding

Plastic or Pressure Welding:

In this procedure, the connecting ends are heated until they melt, then pressure is applied to hold them together. As a result, filler metal is needed.

Welding Fusion:

Non-pressure welding is another name for this type of welding. Metals are heated to their melting point in this procedure. There is no need to apply pressure throughout this procedure.

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