A Comprehensive Guide to Types of Fasteners in CNC Machining--cncmass.com(7075 vs 6061 aluminum Leo)

  • Time:
  • Click:10
  • source:ESKRIDGE CNC Machining


When it comes to precision engineering and manufacturing, CNC machining is renowned for its accuracy and efficiency. The realm of CNC machining encompasses a wide range of components, including fasteners that play a pivotal role in securing different parts together. In this article, we delve into the various types of fasteners used in CNC machining and explore their characteristics and applications.

1. Bolts:
Bolts are one of the most essential fasteners used in CNC machining. These threaded cylindrical rods with external threading enable secure attachment between two or more components. With a vast array of sizes, thread pitches, and materials available, bolts can be customized based on specific requirements. Stainless steel, titanium, and aluminum are some common materials used for producing bolts through CNC machining processes.

2. Screws:
Screws share similarities with bolts but possess internal threads instead, which allow them to create secure joints by engaging with corresponding threads on other components. Self-tapping screws are particularly useful as they eliminate the need for pre-drilled holes. Commonly used in electronic devices, automotive, and aerospace industries, screws offer excellent holding power when produced accurately using high-quality materials through CNC machining techniques.

3. Nuts:
Nuts serve as counterparts to bolts and screws, creating durable connections. These internally threaded blocks made from various metals, such as stainless steel or brass, engage with externally threaded fasteners to form a tight joint. Often shaped hexagonally (hex nuts), they provide ease of use during tightening operations. Precise CNC machining allows for the production of both standard and specialized nuts tailored to diverse applications, ensuring optimal functionality and longevity.

4. Washers:
Washers are simple yet indispensable components used in conjunction with bolts, screws, and nuts. Acting as spacers or protective layers, washers distribute loads evenly while preventing damage to surfaces. Flat washers and lock washers are the most commonly used types in CNC machining. The former helps prevent leaks by creating a seal, while the latter offers additional security against loosening due to vibrations or other external forces.

5. Rivets:
Rivets are permanent mechanical fasteners that do not require threading. Instead, they rely on deformation or buckling during installation, forming a secure bond between materials. Often utilized in aerospace, automotive, and construction industries, rivets offer exceptional strength and reliability. CNC machining plays a vital role in producing high-quality rivets with accurate dimensions and superior finish for various applications.

6. Pins:
Pins are versatile fasteners that can hold parts together or align them precisely. Dowel pins, roll pins, and clevis pins are some common types used in CNC machining. Dowel pins provide precise alignment and eliminate the need for complicated joinery in woodworking and cabinetmaking. Roll pins, also known as spring pins, have a slot cut into their length to allow for compression during insertion, providing strong yet easy-to-manage joints.


Fasteners are integral components in CNC machining, ensuring structural integrity, proper alignment, and ease of assembly. Bolts, screws, nuts, washers, rivets, and pins offer diverse options for securing different elements together, each serving specific purposes based on the application requirements. Utilizing advanced CNC machining techniques allows for the production of these fasteners with utmost precision, resulting in reliable and long-lasting connections. As CNC machining continues to advance, innovative fastener designs will enhance engineering capabilities, enabling complex assemblies and pushing the boundaries of modern manufacturing. CNC Milling CNC Machining