All You Need to Know About Types of Fasteners in CNC is laser engraving Shirley)

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CNC machining has revolutionized the manufacturing industry by providing a high level of precision, efficiency, and versatility. When it comes to creating products using this technology, fasteners play a crucial role. In this article, we will explore the various types of fasteners used in CNC machining.

1. Bolts:
Bolts are one of the most commonly used fasteners in CNC machining. They consist of a head, a shank, and threads on one end. Bolts are utilized to securely hold different components together. They come in various materials, such as stainless steel, aluminum, or titanium, depending on specific requirements like strength, corrosion resistance, or weight considerations.

2. Screws:
Screws are similar to bolts but have threads along their entire length. They are typically used for joining two or more objects by applying rotational force. Within the realm of CNC machining, screws are highly versatile and can be customized based on the material, size, and head type required.

3. Nuts:
Nuts are used in conjunction with bolts and screws to create a secure connection. There are various types of nuts available, including hexagon nuts, wing nuts, lock nuts, and square nuts. Hexagon nuts are the most common choice due to their ease of use and compatibility with wrenches.

4. Washers:
Washers act as spacers or to distribute loads under fastener heads. They help prevent damage to the surface being fastened and improve stability. Flat washers and spring washers are commonly used in CNC machining applications. Flat washers ensure a smooth surface contact between the fastener and the component, while spring washers provide additional security against loosening.

5. Rivets:
Rivets are permanent mechanical fasteners that create a tight joint between two or more parts. They are widely used in assembling sheet metal components. Rivets can be classified into various types, including solid rivets, blind rivets, and tubular rivets. They are often preferred for their strength and resistance to vibration.

6. Dowel Pins:
Dowel pins (or simply dowels) are cylindrical fasteners that provide precise alignment for two or more components during assembly. CNC machining ensures the accurate production of dowel holes, enabling tight tolerances and seamless fits. Dowel pins find extensive use in applications where alignment is critical, such as furniture manufacturing or mechanical assemblies.

7. Inserts:
Threaded inserts allow repeated screwing and unscrewing connections without damaging the base material. These are commonly used in soft materials like plastic or wood, which may not hold threads securely. By inserting helical coils, inserts provide a reliable threaded interface, increasing the lifespan and durability of joints.

8. Retaining Rings:
Retaining rings (also known as circlips or snap rings) are circular fasteners that secure components within a bore or on a shaft groove. Their primary purpose is to retain assemblies axially while allowing easy installation and removal when necessary. Different types of retaining rings include internal and external variants, suitable for different configurations and requirements.


Types of fasteners play an essential role in ensuring strong, durable, and versatile connections in CNC machining. From bolts and screws to nuts and washers, each component has its specific application, material, and design considerations. Understanding the diverse range of fasteners available in CNC machining helps optimize production processes and guarantees high-quality end products. So, whether you are fabricating precision parts or undertaking large-scale manufacturing projects, selecting the correct type of fastener is crucial for success in this advanced manufacturing realm. CNC Milling CNC Machining