Exploring Various Types of Fasteners in CNC Machining--cncmass.com(machined prototypes Cyril)

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CNC machining has revolutionized the manufacturing industry by enabling precision and accuracy like never before. The process involves using Computer Numerical Control (CNC) machines to automate various tasks, including cutting, drilling, shaping, and finishing different materials. One crucial aspect of CNC machining is the use of fasteners, which play a vital role in holding components together. In this article, we will delve into the world of fasteners commonly used in CNC machining processes.

1. Screws:
Screws are among the most traditional types of fasteners found in almost every mechanical application. When it comes to CNC machining, screws come in different shapes, sizes, and designs. These include self-tapping screws, machine screws, wood screws, socket head cap screws, and more. Depending on the requirements, screws can be made from stainless steel, aluminum, brass, or other materials. Threaded holes for screws are typically created using CNC tapping operations.

2. Bolts:
Bolts are similar to screws but differ in their usage. While screws secure two objects together by tightening into threaded holes, bolts usually pass through pre-drilled holes and are secured with nuts at the other end. CNC machining is often employed to create precise bolt patterns and threads in objects, allowing for efficient assembly and disassembly when required. Bolts are commonly made from carbon steel, alloy steel, stainless steel, or titanium based on the desired strength and corrosion resistance.

3. Nuts:
Nuts are essential components that complement bolts, providing additional support for securing objects together. Just like bolts, nuts come in various sizes, shapes, and materials. Common nut types used in CNC machining include hex nuts, locknuts, wing nuts, and T-nuts. CNC milling or turning processes precisely create internal threads in nuts to match the corresponding bolts or screws being utilized.

4. Rivets:
Rivets are permanent fasteners that securely join two or more components without the need for threaded holes or nuts. Their usage is particularly popular in CNC machining when working with materials like sheet metal, where welding may not be suitable. Riveting involves drilling a hole through all the components to be joined and inserting a rivet, then deforming it either by hammering or using specialized machinery. This creates a secure connection between the components.

5. Inserts:
Inserts, often also known as helicoils or threaded inserts, provide reinforcement when dealing with softer materials or worn-out threads. They consist of external screw-like structures internally threaded to accept screws or bolts. When embedded into drilled holes or molded cavities, they create stronger and wear-resistant connections. CNC machining techniques enable precise insertion of inserts during the production process.

6. Washers:
Washers are small flat discs with a central hole used alongside fasteners to distribute load, prevent damage to surfaces, and reduce the chances of loosening due to vibrations. CNC milling can shape washers from various materials such as steel, brass, or nylon. The precise dimensions and smooth edges achieved through CNC machining ensure optimal performance of washers in accommodating different fastener sizes.


Impeccable assembly and structural integrity in CNC machining heavily rely on the correct choice, utilization, and precision production of various types of fasteners. Screws, bolts, nuts, rivets, inserts, and washers serve specific purposes while seamlessly connecting components together in myriad applications. By employing advanced CNC machining technologies, these fasteners can be manufactured with utmost accuracy, ensuring robust assemblies and enhanced functionality across industries. CNC Milling