The Various Types of Fasteners and Their Role in CNC printing tips Julie)

  • Time:
  • Click:6
  • source:NEWRGY CNC Machining


Fasteners play a critical role in the world of manufacturing, particularly in CNC (Computer Numerical Control) machining. These essential components hold different parts together, ensuring stable connections and enabling precision engineering processes. Understanding the various types of fasteners and their specific uses within CNC machining is crucial for producing high-quality products efficiently.

1. Screws:
Screws are widely used in CNC machining due to their versatility. They consist of a threaded body and a head, which provides a surface for gripping and turning with a tool. Screws can be customized based on thread type, such as machine screws, self-tapping screws, or wood screws. Threaded holes enable them to be securely tightened against other components, maximizing stability.

2. Bolts:
Bolts serve a similar purpose to screws but differ in design. While screws have threads along their entire length, bolts feature an unthreaded section called the shank. Bolts often require the use of nuts to secure components together, making them ideal for situations that involve quick assembly or disassembly. Choosing the correct bolt length and diameter helps ensure optimal fastening strength for the specific application.

3. Nuts:
Nuts are indispensable partners to bolts, serving as counterparts in holding components together. They come in various shapes, sizes, and designs, including hex nuts, wing nuts, and locknuts. Hex nuts, with their six-sided shape, are the most common choice in CNC machining projects. Locknuts prevent unwanted loosening under vibrations or external forces, enhancing overall system stability.

4. Washers:
Washers are small, flat metal discs placed between a nut or bolt head and the surface it rests upon. They distribute the load evenly, reducing stress concentrations and preventing damage to the fastened material. Flat washers, split lock washers, and spring washers are commonly utilized in CNC machining. Spring washers provide additional resistance to vibrations, maintaining fastener integrity over time.

5. Rivets:
In situations where screws and bolts may not be practical due to space constraints or aesthetic preferences, rivets offer an excellent alternative for joining materials together. Riveting involves securing components using a cylindrical fastener that is inserted into a pre-drilled hole. As the mandrel is pulled through, the rivet deforms, creating a tight connection. This process provides strength, durability, and a smooth, unobtrusive exterior finish.

6. Inserts:
Inserts, also known as threaded inserts, enhance the quality and longevity of connections made with soft or brittle materials. These small metal cylinders are installed to reinforce screw threads, preventing stripping or wear. The most common types include helical-coil inserts (often called Heli-Coils), key-locking inserts, and self-tapping inserts. By adding strength to fastening elements, inserts expand the possibilities of CNC machining applications.

7. Dowel Pins:
Dowel pins facilitate precise alignment between two components during assembly. These cylindrical rods have a smooth surface and feature chamfered ends for easy insertion. Using dowel pins enhances dimensional accuracy, maintains proper positioning, and improves overall product performance. Typically made from stainless steel or hardened alloy, dowel pins ensure consistency in CNC machining processes.


Fasteners are vital components within the realm of CNC machining, enabling secure connections, stability, and precision when producing high-quality products. Understanding the various types of fasteners—such as screws, bolts, nuts, washers, rivets, inserts, and dowel pins—and their specific roles allows manufacturers to optimize their machinery, improving efficiency and end-product reliability. Incorporating these critical elements appropriately ensures smooth operations and successful outcomes in CNC machining projects. CNC Milling CNC Machining