What Are The Different Types of Fasteners and Where to Use?

By: | January 19 , 2021

Just like your whole body can come apart without the presence of bones and joints, the entire house/office infrastructure can fall apart too if fasteners are not considered at all. However, when it comes to fasteners, we’ve often seen people not knowing the different types and their use cases.

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So, before you select them in a haste, let’s understand the various types and shapes, and get a good understanding of all of them.

1# Nuts & Bolts

Nuts and bolts are connected, and you cannot use one leaving the other behind. Nuts acts as the applicant, and bolts, the applicator, that is, nuts puts everything together and holds it fastened in a frame. It is because of the friction of their threads that they are used together.

  1. Carriage Bolts: It comes in a dome-shaped and has a countersunk head shaped like a square. It is usually used to attach metal to wood and is often called a “coach” bolt too. The square part of the bolt, just under the head, is the part, which remains fastened to the metal. Without it, everything can fall apart.
  2. Hex Head Bolts: These have hexagonal-shaped heads and machine threads, which makes it easier to use in a tapped hole or, with a nut. As they have a unique head shape, make sure you are using a wrench while working with it.
  3. Shoulder Bolts: Also known as stripper bolts, the Shoulder bolts derive their name from their shape, which is like a shoulder located between the thread of the screw and the head of the part. It is quite easy to install, and once it is done, the non-threaded portion remains extended from the position.
  4. Cap Nuts: It comes with a domed top and derives its name from its shape. It has a hexagon shoulder in its sides and has continuous external machine thread lines inside, which help the screws to get fastened up ideally.
  5. Castle Nuts: Also called a slotted or castle nut, these nuts come with cotter pins, which helps to prevent the loosening of it from the material it is attached to. These are generally used with cotter pins and in the applications, which are usually low-torque such as when it comes to holding a wheel bearing to its lace.

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2# Washers

Looks typically like a disc, a washer is a thin plate with a hole in the middle and is generally used to distribute the load of the thread uniformly. It is usually used with a screw and helps it to remain fastened. Especially if you are going to install something heavyweight, washers can help to withhold it.

  1. Backup Rivet Washers: If you want to install something with a larger diameter, then these washers can come to your help. They tend to give a tight hold to the objects and thus used to provide support to weighty objects. They can come as a great option when you want to pull-through through a rivet.
  2. Belleville Conical Washers: These are washers which gives an additional tension to the fastener and are used to increase deflection and load and depends significantly on the type of stack. They are also termed as lock washers and absorb vibration and tension, which in turn absorb vibration.
  3. Dock Washers: Considered generally as washers which can hold immense weight, and are often used while building docks. These are thick washers, which are mainly used during construction, especially heavy-duty. They are frequently recognized as fender washers too due to the small diameter hole that it has inside it.
  4. Fender Washers: These are called the round washers and have one small hole inside it. If you are looking for a washer that will give you an excellent bearing surface along with the fastener, then fender washers can come to your use because of their pull-through feature.

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3# Screws

Though similar to a bolt, screws help in vertical force division and thus helps to hold the object to the wall. They can be of various sizes and many materials and depends solely on your purpose.

  1. Machine Screws: Machine screws, also known as bolts, come with a flat point and are often used in the tapped holes along with nuts and washers. These are also known as “stove bolts” or “stovers” and can be availed in variety because of their diverse drive types and heads.
  2. Hex Lag Screws: Also known as lag bolts, these are usually used to fix large pieces and hold weight. The head of these screws is the external hex and calls for a wrench during installation. It is greatly used for framing, machinery to wood floors, and other heavy-duty applications.

Suggested Psot: Types of Screws

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4# Rivets

Working with metal objects, especially for industrial and security purposes, can be tricky. But with the existence of rivets, things have become quite easy to deal with. It looks like a short metal pin or bolt, and its headless end is beaten down to fix it in the place.

  1. POP Rivets: The POP Rivets, also called the blind rivets, are commonly used to join both the pieces which belong to a particular material. These are usually tubular and comes with a hat-like shape and a mandrel. While installing, it’s length is generally snapped off from the end.
  2. Large Flange POP Rivets: Also known as the oversize rivets, these are different than the standard rivets and usually come with a larger hat-like washer attached to it. They are often referred to as the blind rivets as well and are generally used for connecting both the parts of a particular material efficiently.

Now that we have guided you with the thorough details about fasteners, it will never be a problem for you to choose the right one for your needs. So, go ahead and select the one that fits your requirements.

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