All You Need to Know About the Types of Fasteners in CNC to rivet sheet metal Noel)

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Fasteners are an integral component of various industries, aiding in joining different materials together. In the field of CNC (Computer Numerical Control) machining, fasteners play a critical role in securely holding components and ensuring precise assembly. This article delves into the importance of fasteners in CNC machining and explores different types commonly used in this process.

Types of Fasteners in CNC Machining:

1. Bolts:
Bolts are one of the most common types of fasteners used in CNC machining. They consist of a threaded shank and a head that allows for easy installation and removal. Bolts provide strong and reliable connections between parts, making them suitable for heavy-duty applications that require increased stability. They come in various sizes, lengths, and materials, such as stainless steel, aluminum, and titanium, catering to the specific requirements of different projects.

2. Screws:
Similar to bolts, screws also have a threaded shaft, but they differ in terms of their threading type. While bolts typically feature external threading, screws often have internal threads. These versatile fasteners can be easily driven into pre-drilled holes using a screwdriver or power drill. Screws are available in numerous designs, including flathead, roundhead, Phillips, or hexagonal, allowing for efficient fastening in diverse CNC machining operations.

3. Nuts:
Nuts complement bolts and screws by providing a means to tighten or loosen the connection. They are internally threaded and possess a hexagonal shape, enabling easy gripping with a wrench or socket. Nuts come in various configurations, such as standard nuts, locknuts, wing nuts, or flange nuts, allowing for secure and vibration-resistant assembly in CNC machined products.

4. Washers:
Washers are flat, thin metal discs with a hole in the center. Their primary purpose is to distribute the load and reduce friction between fasteners and the surface they are attached to. They act as protective barriers, preventing damage or distortion on sensitive components during assembly or tightening. Using washers in CNC machining ensures even pressure distribution, enhancing the reliability of joints.

5. Rivets:
Rivets are permanent fasteners widely employed in sheet metal fabrication processes within CNC machining. They consist of a smooth cylindrical body with a pre-molded head at one end. During installation, rivets are inserted into pre-drilled holes and deformed using hydraulic or pneumatic tools, creating a tightly secured joint. Due to their high shear strength and resistance to vibration, rivets find usage in diverse industries, including automotive, aerospace, and construction.

6. Studs:
Studs are versatile threaded rods without a head. They provide protruding male threads at both ends, facilitating convenient attachment of various components by mating with nuts or internally threaded objects. Studs eliminate the need for tapping internal threads, simplifying operations in CNC machining and allowing for efficient disassembly and reassembly.


CNC machining relies heavily on the use of fasteners to bring precise designs to life. The aforementioned types of fasteners - bolts, screws, nuts, washers, rivets, and studs - play crucial roles in secure and reliable assembly across different industrial applications. By understanding these fastener options and selecting the appropriate type for specific project requirements, manufacturers can achieve optimal results in terms of structural integrity, functionality, and ease of maintenance. So the next time you come across CNC machined products, take a moment to appreciate the importance of the various types of fasteners that hold them together. CNC Milling CNC Machining