Understanding Different Types of Fasteners for CNC Machining--cncmass.com(bead blast material Michaelia)

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CNC machining plays a significant role in the manufacturing industry, allowing precise and efficient production of various components. One crucial aspect of CNC machining is the use of fasteners to hold parts together securely during the fabrication process. In this article, we will explore different types of fasteners used in CNC machining, their characteristics, and how they are produced.

Types of Fasteners used in CNC Machining:

1. Bolts and Screws:
Bolts and screws are one of the most common types of fasteners used in CNC machining. They are versatile and come in various sizes, shapes, and materials. Bolts typically have external threading with a matching nut, while screws incorporate internal threading that allows them to be driven into pre-tapped holes. Both bolts and screws provide firm fastening due to their threaded design.

To produce bolts and screws, manufacturers start with raw materials like steel or stainless steel rods. These rods are cut into appropriate lengths, followed by a heat treatment process to enhance strength and durability. The next step involves thread cutting using CNC machines, where the proper pitch and depth are determined. Finally, surface finishing processes such as coating or plating may be applied for improved corrosion resistance or aesthetics.

2. Nuts:
Nuts complement bolts and screws, providing a secure and stable joint when tightened against a threaded fastener. Similar to bolts, nuts also come in various sizes and materials. This enables compatibility between specific fasteners and ensures uniformity within a project's assembly requirements.

The production process for nuts begins with casting or forging, depending on the desired material and size. Once the basic shape is formed, precision machining techniques using CNC equipment are employed to create the desired inner threads. After completing all necessary machining operations, additional treatments like polishing, coating, or plating might be added for functionality and appearance purposes.

3. Rivets:
Rivets are non-threaded fasteners that permanently join two or more components together. They are ideal for applications where welding or screwing is not feasible or desired, such as attaching thin sheets of material. Rivets consist of a cylindrical body with a head on one end and a tail on the other. The tail is deformed using specialized tools to create a secure connection.

Manufacturing rivets typically involves extracting long tubes from selected metals like aluminum or steel. These tubes are cut into shorter lengths to form individual rivets. CNC machines then shape the heads of the rivets, while dies deform the tails during installation. Sophisticated riveting equipment ensures uniformity and strength in each joint created.

4. Washers:
Washers are flat, disk-like plates typically positioned between the fastener head/nut and the surface of the component being secured. Their primary role is to distribute the load evenly by providing a larger contact area, thereby protecting the component and reducing the risk of damage due to concentrated pressure.

To produce washers, manufacturers start with metal sheets that match the required washer diameter and thickness. CNC machining techniques are utilized to cut out the circular shape, ensuring precise dimensions. Surface treatments can be applied to enhance durability and prevent corrosion based on specific application criteria.


Fasteners serve a crucial function in CNC machining, securing components firmly together during the manufacturing process. Bolts, screws, nuts, rivets, and washers are just a few examples of the wide variety available. Understanding these different types and their production processes allows manufacturers to select appropriate fasteners that meet the requirements of specific applications. As technology advances, CNC machining continues to revolutionize the industry, enabling enhanced precision and efficiency throughout various manufacturing processes. CNC Milling CNC Machining