Understanding Different Types of Fasteners in CNC Machining--cncmass.com(copper brass bronze Susie)

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


CNC machining has revolutionized the manufacturing industry, providing precise and efficient production processes. As part of this advanced technology, fasteners play a crucial role in holding various components together securely. In this article, we will explore the different types of fasteners used in CNC machining and understand their significance in producing high-quality products.

1. Hex Bolts and Cap Screws:

Hex bolts and cap screws are widely used fasteners in CNC machining due to their strength and versatility. These fasteners consist of a threaded shaft with a hexagonal head at one end. They are designed to withstand heavy loads and provide exceptional grip when tightened using a wrench or socket. Depending on the specific application, these fasteners come in various lengths, diameters, and materials, ensuring compatibility with diverse CNC machining projects.

2. Machine Screws:

Machine screws are smaller in size compared to hex bolts and cap screws but equally important in CNC machining. They have machine threads that extend for their entire length, allowing them to be inserted into pre-tapped holes or combined with a nut to secure objects together. Machine screws are commonly used to hold metal plates, panels, and other components in place during the CNC machining process.

3. Self-Tapping Screws:

Self-tapping screws are highly popular in CNC machining as they eliminate the need for pre-drilled pilot holes. These fasteners have sharp points and distinct threading, enabling them to cut through the material while creating their own threads. This saves time and effort during assembly, making self-tapping screws ideal for applications involving thin sheet metals, plastics, and wood.

4. Nuts and Washers:

Nuts and washers are essential components that complement various fasteners in CNC machining operations. Nuts are internally threaded and designed to mate with bolts or screws, securing them tightly. Similarly, washers act as protective layers between the fastener head and the material, minimizing friction and preventing damage. By using specific types of nuts and washers, engineers can enhance the overall reliability and stability of CNC machined products.

5. Rivets:

Rivets are permanent fasteners often used in CNC machining to join multiple metal sheets or components together permanently. They consist of a cylindrical shaft with a rounded head at one end. Rivets are inserted through pre-drilled holes and then deformed by applying pressure, creating a secure connection. These fasteners find extensive use in industries such as aerospace and automotive manufacturing where structural integrity is paramount.

6. Threaded Inserts:

Threaded inserts play a vital role in reinforcing weak materials, including plastics and composites, during CNC machining. These inserts are commonly made of brass, stainless steel, or other durable materials. They provide a sturdy threaded cavity that allows for repeated screw insertion without damaging the host material. Threaded inserts greatly improve the holding strength of fasteners in materials that would otherwise strip or wear out quickly.


Understanding the different types of fasteners used in CNC machining is crucial for achieving optimal performance, durability, and precision in product manufacturing. From hex bolts and cap screws to self-tapping screws and rivets, each type serves a specific purpose, ensuring robust assembly and seamless operation. By utilizing appropriate fasteners and their corresponding components like nuts, washers, threaded inserts, and more, manufacturers can produce high-quality CNC machined products that meet industry standards and customer expectations. CNC Milling CNC Machining