A Comprehensive Guide to Types of Fasteners in CNC Machining --cncmass.com(what is a chamfered edge Jenny)

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CNC (Computer Numerical Control) machining is a versatile manufacturing process that involves the use of computer-controlled machines to produce precise and accurate parts. One crucial aspect of CNC machining is fasteners, which are essential for holding different components together. In this article, we will explore various types of fasteners used in CNC machining and their significance in ensuring product integrity.

1. Screws:

Screws are commonly used fasteners in CNC machining due to their simplicity and effectiveness. They consist of a threaded rod with a head that allows easy installation and removal using a compatible drive tool like a screwdriver or wrench. Screws come in various designs such as Phillips, slotted, hexagonal, or Torx heads, each suited for specific applications.

In CNC machining, screws play a vital role in securing workpieces onto fixtures or attaching multiple components. Additionally, they offer adjustable tension and provide reliable connections by exerting clamping force through threads.

2. Bolts:

Similar to screws, bolts are externally threaded fasteners typically used in conjunction with nuts to create robust connections in CNC machining. Unlike screws, bolts feature a shaft without an integrated driving feature. Instead, they rely on external forces applied using tools like wrenches or spanners to tighten them.

Bolts are preferred when disassembly may be required, allowing for quick replacements or adjustments during prototyping or material testing stages. The compatibility between bolts and nuts enhances structural stability in complex assemblies.

3. Nuts:

Nuts complement bolts in CNC machining processes, creating secure and durable connections. Made with internal threading, nuts precisely fit onto bolt shafts, offering tremendous versatility in joining multiple components. By tightening the nut against a separate object, it generates axial tension, locking the bolt securely.

Typically, nuts are classified into several categories, including hex nuts, wing nuts, lock nuts, and cap nuts. Each type serves specific purposes within CNC machining, presenting options for improved functionality and durability.

4. Rivets:

Rivets are permanent fasteners commonly used in situations where disassembly is not required. They consist of a cylindrical body with a hollow center known as the shank and a head on one end. During installation, rivets go through pre-drilled holes, securing components together by deforming and flattening their non-head ends.

CNC machining utilizes solid rivets, blind rivets, or self-piercing rivets depending on specific project requirements. The use of rivets ensures tight joints, resistant to vibrations and irregular loads while eliminating concerns regarding loosening over time.

5. Washers:

Washers may seem inconspicuous, but they hold significant importance in CNC machining processes. These thin discs with holes in the middle are inserted between fastener heads or nuts and the surface being secured. By evenly distributing the load and reducing friction, washers prevent damage to materials due to uneven pressure distribution.

Various types of washers exist, including flat washers, lock washers, and spring washers, each designed to cater to different applications. Selecting the appropriate washer minimizes material surface imperfections, enhances corrosion resistance, and promotes effective sealing.


Fasteners play an indispensable role in CNC machining, ensuring the stability, integrity, and longevity of assembled products. By understanding and utilizing different types of screws, bolts, nuts, rivets, and washers, manufacturers can create precise components and assemblies that meet design specifications while standing up to various operating conditions.

Ensuring the appropriate selection and proper application of fasteners contributes significantly to achieving optimal product performance, reliability, and customer satisfaction in the world of CNC machining. CNC Milling CNC Machining