Understanding Various Types of Fasteners Used in CNC Machining--cncmass.com(die-casting Upton)

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In the world of CNC (Computer Numerical Control) machining, fasteners play a crucial role. These small but mighty components ensure that various parts and materials are securely held together during the machining process. Each type of fastener has its unique characteristics and purpose, enabling precision engineering to take place seamlessly. This article aims to shed light on different types of fasteners used in CNC machining and their significance in creating high-quality products.

1. Bolts and Screws:
Bolts and screws are commonly used fasteners designed for joining two or more components with threaded holes. While bolts typically have external threads, screws usually have internal threads. Both these fasteners have heads that can be tightened using specific tools like wrenches or screwdrivers. In CNC machining, bolts and screws provide sturdy connections ensuring stability and security.

2. Nuts:
Nuts complement bolts and screws by providing an additional component to fasten them tightly. These hexagonal pieces with threaded holes allow controlled tightening of the fastener, ensuring optimal binding strength. An important aspect of nuts is their compatibility with different bolt sizes and thread pitches as per the requirements of the CNC machined part.

3. Rivets:
Rivets are permanent fasteners widely used in CNC machining to create fixed joints. They consist of a cylindrical shaft called a rivet body and a head at one end. When inserted through aligned holes in multiple components, they undergo deformation using specialized tools called riveters, securing the joint permanently. The advantage of rivets lies in their ability to distribute the load evenly across the joint area, making them ideal for structural applications.

4. Washers:
Washers are flat-disc-shaped fasteners placed between the fastening surface and the nut or bolt head. They serve several purposes, including distributing the load evenly, reducing friction, preventing loosening due to vibration, and protecting the underlying surface. Washers are available in various materials such as steel, stainless steel, nylon, or rubber, depending on their intended application.

5. Pins:
Pins, also known as dowel pins or locating pins, are cylindrical fasteners designed to maintain accurate alignment between two or more CNC machined components. They prevent unwanted movement during assembly, ensuring precise fits and reducing tolerance-related issues. Pins play a vital role in achieving dimensional accuracy, particularly in high-precision machining processes.

6. Clips and Clamps:
Clips and clamps are versatile fasteners used to secure objects or hold parts in place temporarily during CNC machining operations. They provide flexibility and convenience by allowing quick adjustments and repositioning without compromising stability. These fasteners come in various forms like spring clips, C-clamps, toggle clamps, and magnetic bases, catering to different production setups.

7. Anchors:
In CNC machining scenarios requiring attachment to concrete or other solid surfaces, anchors become indispensable fasteners. By drilling holes into the substrate and inserting specialized expansion anchors or chemical anchors, secure connections can be established. Anchors offer stability and structural strength when mounting heavy equipment or fixtures in workshops or industrial environments.


Understanding the types of fasteners commonly employed in CNC machining is essential for ensuring successful product development and manufacturing. Bolts and screws, nuts, rivets, washers, pins, clips and clamps, and anchors all serve unique purposes in providing reliable and sturdy connections. Each type brings value to precision engineering, enhancing the overall performance and quality of CNC machined products. By selecting the appropriate fastener for specific applications, manufacturers can achieve optimal results while meeting design specifications and industry standards. CNC Milling