Bolts, Screws and Nuts: Differences and Various Types and Their Applications

Bolts, Screws and Nuts - As we know. In the world of mechanics there are a lot of mechanical components that we should know, the components are from the smallest to the largest. In the discussion of this article, we will discuss one of the mechanical components in the form of a basic component in machining and automotive lessons.

Nuts, bolts, and screws are components that are needed in the machining world. This component is a basic component and is very important in the world of machining, it is undeniable that parts that cannot be separated from motor engine parts are nuts, bolts, and screws. The main function of these components is to bind part by part so that it becomes a complete form.

Of the three components there is often a mispronunciation, between nuts, bolts, and screws. What's the difference? In fact, all three have the same function. On this occasion we will discuss the differences between nuts, bolts, and screws, and their application. Let's see the following article!

Bolts and Screws

Definition of Bolts and Screws

Bolt and screw is a connection tool using a round and threaded iron rod which on one side has a bolt or screw head, and the other end is often fitted with a nut / lock to lock the bolt.

Although in terms of shape looks the same between bolts and screws actually have some differences. The bolt itself has a thread that is not thorough, meaning that the thread does not reach the bolt head here. While the screw has a complete thread from the tip of the screw to the head of the screw, for other differences you can see on the head of the bolt. in its application to bolts do not use a screwdriver to turn it, while screws require a screwdriver to turn it. Maybe from the explanation above you can see the difference between a bolt and a screw. For the next, let's discuss the types of bolts and screws.

Types of Bolts and Screws

1. Round Head Bolt

This type of bolt is very commonly used with the characteristics of a round head. In some round head bolts have a part of the stem that is square in shape to hold the bolt. In its application it can be used to bind the wooden floor of the truck body or for the metal bumper.

2. Gutter Bolt

Gutter bolt is a type of bolt that has a full thread and is often galvanized (galvanized) with a dome-shaped head and a groove for a min or plus screwdriver. This type of bolt is commonly used with a nut to fasten lightweight materials and sheet metal.

3. Fastening Screw

This type of screw has a head like a bolt but the thread has a full thread from the end to the screw head. The head has a hexagon shape. Usually better known by the name of the screw head (cap screw). This type is widely used in joining and fastening both objects.

4. Stud Bolt

The shape of the stud bolt is headless and has threads from each end. Applied in a number of industries for fitting parts, industrial equipment, flanges and fittings on machines. This type is available in various sizes and can be configured double end or tap end.

5. Partially Threaded Bolt

It has a full thread of small diameter equipped with a square or hexagon nut on the head which can be round or “cheese head” and in some there is a groove for a screwdriver. This type is used for placing lightweight components or small brackets.

6. Plow Bolt

This type has the characteristics of a pointed head that can be inserted into the embedded screw hole. From the shape of the head, it is almost the same size as the threaded rod, so when it is attached, the head will sink on the surface of the component. These bolts are used to mount the blade on dozers and graders that require a ground connection, so that the driven soil can rotate/roll smoothly on the bonded parts.

7. Taper Lock Study

There is a special thread to produce a thread whose last few threads are tapered. This type has threads that are almost as sharp as to create an interference fit when the stud is installed. This type is used in heavy load applications on moving equipment.

8. U-Bolt

This bolt has a "U" shape which is true to its name. At the end it is equipped with a thread that is slightly tenuous and in the application of this bolt to lock a tubular object such as an example to hold leaf springs on the axle of the vehicle.

9. Split Pin

Made of steel which has a slightly pointed end, then on the back there is a round indentation to lock a component. This pointed steel pin has a flat section on one side and a small threaded section on the small end. Its flat pointed section is used to hold components such as truck king pins in place. Castellated nut nuts and washers need to be attached to this split pin to avoid movement.

10. Grub Screw

A type of headless screw that may be provided with a groove for a screwdriver or an indentation for an L wrench. This type is used when the screw must be screwed under a submerged surface.

11. Self Drilling Screw

Equipped with a head that is flat on top and there is a place to turn the screw, then the thread is slightly loose and at the end it is shaped like a nail. This type of application is applied directly into the sheet metal or a special sheet metal nut is attached to the component.

12. Battery Bolt

Battery bolt is a type of bolt that is used to tighten the terminals on the battery components (battery) both the positive and negative valves of the battery. This bolt is characterized by a head that is galvanized (galvanized) firmly so that it can be bonded to the battery terminals.

Nut

Definition of Nut

A nut is a mechanical component that has a mixture of metal as a base material and is in the form of a hexagon in the middle of which there is a threaded hole, which functions as a fastener or lock between the bolt and the object of an object. So the nut plays a role in helping the bolt to clamp an object so that the two objects between the nut and the bolt become a single unit that binds each other.

1. Castellated Nut

A type of nut with a crown-shaped head and with a locking slot (castellated nut & slotted nut) equipped with a locking mechanism. This type serves to lock the position of the nut so as not to change and shift the predetermined position.

2. Lock Nut

Is a nut that has a thinner size than a nut in general. The application of the lock nut is mounted under the main nut which functions as a lock.

3. Hexagonal Nut

Hexagon-shaped and this type of nut is the most widely or most commonly used. There are types of hexagonal nuts that are equipped with a flange (plate) at the bottom which functions the same as a nut that uses a washer.

4. Capped Nut

At the top of this nut has a round cap (dome) without any holes in the cap while the bottom of the dome cap has six flat sides that are used to tighten or loosen the nut. When tightening, this type can only be turned until the end of the bolt has touched the dome cover. Therefore, the length of the bolt attached to this type of nut must have a short size (not too long) so that it can be tightened optimally.

5. Wing Nut

The body of the nut has two wings on the two opposite sides. The two wings on the sides of this nut have a fairly large size because to tighten and loosen this type of nut using both sides of the wing. This type of wing nut is used in the use of connections that are not concerned with torque (torque) in tightening because in general this type of nut is only tightened or loosened using the fingers so that the tightening force (moment) is only limited to hand strength.

Thus the discussion this time about bolts, screws, and nuts. Hopefully you can understand the differences between the three types and their application in engineering.