Bolts are the main parts of mechanically based projects, and they come in different types. also has different bolt heads. that helps to connect bolts for different points and projects. Bolt heads have different shapes, like hex, square, and slotted. Washers are commonly used. Square head bolts are older types that are used. These bolts come with a shaft that manages movement after torque is applied.
In this post, we will cover the detailed features of different types of bolt heads and their practical applications. So let’s get started.
Types of Bolt Heads
Flat Bolt Head
- This bolt head has a flat design on the upper and lower sides. It employed applications where limited clearance was needed, like for fragile materials or for clear finishing. Flat heads are also employed for low-profile fastener designs since the head is connected with the material surface.
Oval Bolt Head
- Its upper side is round in shape, and its sides are tapered, like an oval. It is part of applications where chances of material damage exist and comes with a low profile compared to a hex bolt head.
- It is also part of applications where a low-profile fastener is needed since the bolt head passes to the surface of materials.
Pan Bolt Head
- A pan bolt head comes with a flat lower part and a curved upper portion and cone-like sides towards the shank. It is preferred for metallic material fastening where a smooth surface is needed with a high bearing surface.
- Its design is similar to round heads, as it is also employed for decorative applications.
Truss Bolt Head
- This bolt comes with a low profile and a larger diameter, and also has a rounded upper part and a flat inner side. The truss bolt head is preferred for fastening material on the surface, as the larger diameter helps distribute the load in a uniform way.
Round Bolt Head
- A round bolt head has a cylindrical design with a flat upper part and a lower part. Its head is like a dome and is mostly used for decorative applications. Round heads are not commonly used like other bolt heads and are also used for special applications.
  Hex Bolt Head
- It is a commonly used bolt head that comes with a six-sided design. The hex bolt head is used for different applications like vehicles, construction, and other projects.
- A 6-sided head can easily loosen and tighten through the socket or a wrench.
- Their structure provides easy gripping for the socket, and we can easily apply torque.
Hex Washer Bolt Head
- This bolt head comes with a washer fused over the hex head, which provides a larger bearing surface. That is preferred for materials that require a larger-sized hole.
- • The hexagonal head also has a round washer at the lower side. A washer distributes bolt load smoothly over the surface of the materials where it is applied.
  Slotted Hex Washer Bolt Head
- • The bolt head comes with a washer and a slotted hexagonal design, which provides a simple connection with a flathead screwdriver. Slots help bolts to easily loosen and tighten with a screwdriver as compared to a socket.
- A washer on the bolt head smoothly distributes the load of the bolt uniformly over the material’s surface, and the hexagonal head is used for applying high torque.
Socket Cap Bolt Head
- The socket cap bolt head has a cylindrical structure with a flat top and a hexagonal design in the middle. It is used for applications where high torque is required, like in the vehicle industry.
- small cylindrical head employs a socket driver. The design of this bolt head is like a hex head since they are easily controlled with loosening and tightened through a socket. It also has a cylindrical design.
Button Bolt Head
- • The button bolt head comes with a top round side that inserts into the material’s surface to provide a clear finish. This head provides accurate material fastening and is used for decorative components.
FAQs
What is the purpose of the bolt head?
- • The bolt head is the upper part of the bolt that makes easy loosening and tightening with different tools like a socket and a screwdriver.
What are the basic types of bolt heads?
- Hex head
- Square head
- Flanged head
- Round head
- Socket head
Why are hex heads so commonly used?
- Hex heads come with an accurate and strong grip and are turned with different tools, and are preferred for closed spaces.
What are the types of bolts?
- Anchor Bolts.
- Blind Bolts.
- Carriage Bolts.
- Double-End Bolts.
- Eye Bolts.
- Flange Bolts.
- Hex Bolts.
- Machine Bolts and Machine Screws.
What are bolts with Allen heads called?
- Allen head screw, also called socket screw,s is connected through a hexagonal wrench and uses a key for loosening and tightening. standard size can be easily accessed. machine components, clamping needs, and socket head cap screws.
What is a bolt without a head?
- It is called a rod with threads, the threaded rod does not have a head and comes in different materials and grades. threaded rod, also called redi-rod ATR, and employed for making a connection of an anchor bolt with hand piping with the ceiling
What is the difference between a bolt head and a nut?
- • The bolt head is fixed and employed for bolt tightening, and the nut is threaded over the other end for the connection of components.
When is a socket head bolt used?
- Socket head bolt is used in restricted spaces and also to tighten the bolt inside through a hex key or Allen wrench.
Where are flanged bolt heads used?
- It comes with a washer at the base side of the head for pressure distribution and minimizes loosening.
Can bolt heads affect the strength of a joint?
- The design and structure of the bolt head affect clamping force and provide easy maintenance and load distribution.
What is a bolt head called?
- • The head of the bolt is defined as the top part of the bolt. The bolt head has different shapes and designs and can easily be managed through a driver. The threaded bolt end comes with a helical ridge that provides rotation in the threaded side.
What are the 4 parts of a bolt?
- • The point on the bolt where the thread exits and the shank starts is called the runout. smooth bolt threadless part called the shank.
- An arc that makes a connection with the head to the shank is called a radius. The part of the bolt that the torque instrument holds for tightening and loosening is called the head.