Exploring Different Types of Fasteners in CNC Machining(precision investment casting Norton)

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In the world of CNC machining, fasteners play a vital role in connecting various components together. These small yet mighty pieces are crucial for ensuring structural integrity and functionality in different industries. In this article, we will delve into the realm of fasteners, their types, functions, and how they are produced using CNC machining.

1. Screws:
Screws are one of the most common types of fasteners used across industries. They come in various forms like machine screws, self-tapping screws, wood screws, and many more. When producing screws using CNC machining, it begins with designing the precise thread pattern on the screw shaft. The raw material is then fed into a lathe or milling machine to shape the head and body of the screw accurately.

2. Bolts:
Bolts are similar to screws; however, they have a threaded shaft designed to pass through pre-drilled holes. Bolts provide strong clamping force by using nuts on the opposite side. CNC machining processes involved in bolt production include threading, turning, milling, and drilling. The bolts' dimensions, such as length, diameter, and threads per inch, can be customized based on specific requirements.

3. Nuts:
Nuts are female threaded fasteners that mate with bolts to secure two or more parts together. CNC machining produces nuts by cutting internal threads on cylindrical stock materials. Different types of nuts include hex nuts, square nuts, wing nuts, and flange nuts. Accuracy in nut production is essential to ensure compatibility and easy assembly with corresponding bolts.

4. Rivets:
Rivets are permanent mechanical fasteners often used when welding or soldering is not an option. They consist of a cylindrical shank and a head on one end. Through specialized CNC machining techniques like cold forming, rivets are produced from solid metal bars or wires. The process involves shaping and forming the rivet head, while the shank is subsequently sized to fit through pre-drilled holes.

5. Washers:
Washers are flat, thin discs with a hole in the center used to distribute load over a larger area when tightening fasteners. They help prevent damage to fragile surfaces or provide insulation between different materials. CNC machining produces washers by cutting them out from sheet metal, stamping, or laser-cutting techniques.

6. Pins:
Pins are cylindrical fasteners used for aligning or joining components. Dowel pins, roll pins, and split pins are some common types used across industries. Precision CNC machining ensures accurate dimensions and smooth finish required for pin production. The process includes turning, milling, drilling, and grooving as per the design specifications.

7. Clips:
Clips are versatile fasteners that hold objects together or secure them in place. Spring clips, retaining rings, and circlips fall under this category. CNC machining techniques like wire bending, stamping, and precision cutting are utilized to produce clips of various shapes and sizes. Material choices such as stainless steel, brass, or even plastics depend on the clip's intended application.


Fasteners play an essential role in various industries, ensuring structural integrity and functionality in CNC machined products. This article explored different types of fasteners, including screws, bolts, nuts, rivets, washers, pins, and clips. Understanding their manufacturing processes using CNC machining sheds light on the precision and versatility involved. As technology advances, CNC machining will continue to revolutionize the production of fasteners, resulting in improved quality and performance in countless applications. CNC Milling CNC Machining