Understanding Different Types of Fasteners Used in CNC Machining--cncmass.com(sheet metal finishing Phoebe)

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CNC machining is a highly advanced manufacturing process that involves the use of computerized controls to shape various materials into precise components and products. One crucial aspect of CNC machining is the use of fasteners, which play a significant role in holding different parts together securely. In this article, we will explore the types of fasteners commonly used in CNC machining processes, their functions, and how they are produced.

Different Types of Fasteners:

1. Screws:
Screws are versatile fasteners used in many CNC machining applications. They consist of a cylindrical body with threads on the outside and often come with a slotted or Phillips head for easy tightening. Screws can be self-tapping or require pre-drilled pilot holes based on the specific requirements of the application.

2. Bolts:
Similar to screws, bolts are externally threaded fasteners, but they typically don't have any pointy ends or tapered tips. Instead, bolts are usually paired with nuts for secure fastening. The threads of bolts engage with the internal threads of nuts, creating a strong joint. Bolts come in various sizes and lengths, allowing for flexibility in CNC machining tasks.

3. Nuts:
Nuts are internally threaded fasteners designed to pair with bolts, providing a reliable connection between two or more components. They are available in different shapes and sizes, such as hexagonal, square, or flanged nuts, catering to specific operational needs. CNC machines often produce nuts in mass quantities using high-quality metals like steel, brass, or stainless steel.

4. Rivets:
Rivets are permanent fasteners made from a solid cylindrical shaft and a formed head at one end. They are commonly used when welding or gluing isn't feasible, such as joining thin sheets of metal or securing soft materials. A rivet is inserted through aligned holes, and its tail end is expanded or "bucked" to form a strong, secure bond. CNC machining allows for precise placement and installation of rivets in various applications.

5. Washers:
Washers are thin, flat discs with a hole at the center that fits around screws, bolts, or other fasteners. Their main function is to distribute the load and prevent damage to the material being fastened by reducing friction and evenly distributing forces. CNC machines accurately produce washers to ensure their dimensions match the specific requirements of the application.

Producing Fasteners through CNC Machining:

CNC machining has revolutionized the production of fasteners with its unparalleled precision and efficiency. The process begins with designing and programming the machine using computer-aided design (CAD) software. Once programmed, the CNC machine follows the instructions to create fasteners from raw materials like metal rods or sheets.

Different cutting tools, such as drills, taps, or mills, are utilized to create threads in screws, bolts, and nuts. These cutting tools are selected based on the desired thread type and size. CNC machines can also perform secondary operations like chamfering edges or adding grooves for enhanced functionality.

For washers, the CNC machine uses precision punches or laser cutters to shape them into the required dimensions and forms. Rivets undergo similar processes where CNC machines punch holes in the base material and then "set" the rivet in place within those holes.


Fasteners play an integral role in holding components together in CNC machining processes, ensuring the structural integrity and reliability of the final product. Understanding the different types of fasteners available and their appropriate applications is crucial for successful CNC manufacturing.

Thanks to CNC machining technology, the production of fasteners has become more efficient, precise, and cost-effective. Whether it's creating well-threaded screws, durable bolts and nuts, or precisely punched rivets and washers, CNC machines continue to enhance the performance and quality of fasteners used in various industries. CNC Milling