When it comes to fastening materials together, two of most common bolt head styles used in assembly and construction are socket head and button head. Both serve different purposes in different applications, and having a basic understanding of differences between them is important when selecting which one is best for a particular job.
The socket head bolt is usually most commonly used fastener type, mostly due to its versatile design. The head has a hexagonal shape with an internal socket designed to be engaged by a hex key, also known as an Allen key. The head is low profile, allowing bolt to be installed in tight spaces while still providing a high level of tensile strength. The shape of head is also designed to provide a better grip than other standard bolt head styles and is often used in applications where there is a need to adjust bolt or remove it for maintenance.
The button head bolt, on other hand, is slightly larger than socket head bolt and offers a more secure fastening option. The head is generally rounded and flat, with a countersunk internal recess. This style of head provides a better grip when tightening and also allows for a more even distribution of load across fastener. Button head bolts are commonly used in applications where they need to be tightened to a very specific torque, as head provides a better surface for application of torque wrench to be applied.
The main difference between socket head and button head bolts is pattern of their recess. Button heads have a countersunk recess and socket heads have a hexagonal recess, which allows for better engagement with Allen key. This in turn, influences application and use of fastener. While socket head is a more versatile bolt, button head offers more secure fastening and is better suited for high torque applications due to its design.
When selecting a bolt type for an application, it is important to consider purpose and requirements of job. In most cases, socket head is recommended type of bolt for general use, while button head is better suited for applications where additional security and tightness are required. Additionally, finish of bolt must also be considered, because it can have an effect on strength and durability of fastener. A high-quality finish on bolt will help to protect it from corrosion and damage, and should always be used when bolt will be exposed to harsh environmental conditions.
Overall, socket head and button head bolts serve different purposes in different applications. Understanding differences between two is important when selecting which type of bolt is best for a particular job. While both styles can provide a secure fastening solution, socket head is typically more versatile bolt, while button head is better option for high torque applications.