Exploring the Various Types of Fasteners in CNC Machining--cncmass.com(cnc milling services Otis)

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CNC machining has revolutionized manufacturing processes across industries, allowing for precise and efficient production of various components. In this article, we will delve into the fascinating world of fasteners – essential components used in CNC machining. We will explore different types of fasteners, their functions, and how they are produced.

Types of Fasteners:

1. Bolts:
Bolts are one of the most commonly used fasteners in CNC machining. They are characterized by a cylindrical shaft with external threads and a head that can either be hexagonal or square-shaped. The threaded end allows them to securely join two or more components together while the head provides grip for tightening using a wrench or socket.

To produce bolts, manufacturers start by selecting the appropriate material, such as stainless steel, titanium, or alloy steel, depending on the specific requirements. The chosen material is then shaped into rods, which go through a process called threading to create the external threads along their length. Once the threads are formed, the heads are machined according to the desired specifications.

2. Nuts:
Nuts are complementary fasteners used with bolts. They feature an internally threaded hole, allowing them to easily engage with external threads of bolts. Nuts are available in various shapes – hexagonal, square, wing, or even specialized designs like T-nuts used in woodworking applications.

Producing nuts involves similar steps as bolts. After selecting the suitable material, it is shaped into a solid cylinder before undergoing threading operations. Manufacturers must ensure precision during the creation of internal threads to ensure the compatibility and reliability of nuts.

3. Screws:
Screws look quite similar to bolts; however, they differ in terms of function. While both have external threads, screws are generally used to fit into tapped holes or create threads within materials without pre-existing holes. It enables them to securely fasten components together without requiring a nut.

To produce screws, the material undergoes similar initial shaping processes as bolts and nuts. However, the threading operation is more intricate, as screws must have sharp threads suitable for piercing into materials or engaging with tapped holes firmly. Machining processes ensure screw heads are created to facilitate turning them using either an appropriate driver or by hand.

4. Rivets:
Rivets provide a permanent means of joining two or more materials, mainly in situations where welding is impractical or unwanted. They consist of a cylindrical body with a solid shank and a head formed on one end. The other end gets deformed to create a second head when installed, creating a secure connection.

Manufacturers typically produce rivets from materials such as aluminum, steel, or copper. The production process involves forming the cylindrical body and then shaping the heads according to specific designs. Installing rivets requires specialized tools like rivet guns or hammers to deform their unheaded end, ensuring a tight and sturdy connection.


Fasteners play a crucial role in CNC machining processes, providing strength, stability, and flexibility to assemblies. Whether it be bolts, nuts, screws, or rivets, each type has its unique purpose and manufacturing requirements. Understanding these different types of fasteners helps engineers and manufacturers select the most suitable option for efficient and reliable connections in CNC-machined components. CNC Milling CNC Machining