Exploring Various Types of Fasteners and Their Functions in CNC Machining--cncmass.com(bead blasting vs sandblasting Polly)

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CNC machining plays a significant role in producing various products, including those that utilize different types of fasteners. Fasteners are essential components used to join or secure two or more objects together. With advancements in technology, the range of fastener options available for use in CNC machining has expanded significantly. This article aims to delve into the world of fasteners, providing a comprehensive understanding of their types, functions, and applications within CNC machining processes.

1. Bolts and Screws:

Bolts and screws are among the most commonly used fasteners in CNC machining. They are utilized to hold components together firmly. Bolts typically have external threads and require nuts to secure them, while screws possess internal threads and can be tightened directly into tapped holes. These threaded fasteners come in various sizes, lengths, and materials to accommodate specific requirements according to their application.

2. Nuts:

Nuts complement bolts by providing a means to securely fasten components together. Usually hexagonal in shape with an internally threaded hole, they are tightened onto bolts using tools such as wrenches or spanners. Nut variations exist, such as wing nuts or lock nuts, which offer additional ease of use and increased stability in particular cases.

3. Washers:

Washers are flat, thin plates often placed between a nut and bolt head or the material being joined. They help distribute the load evenly, prevent damage to surfaces, reduce friction, and increase stability. Different types of washers include plain washers (regular, hardened, or spring), locking washers (such as split or toothed washers), and special-purpose washers like fender or O-rings.

4. Rivets:

Rivets are permanent fasteners used when disassembly is not required. They consist of a smooth cylindrical shaft with heads on either end. Rivet heads are formed by deforming one end of the rivet after inserting it through aligned holes in the materials being joined. The deformation creates a permanent connection, making rivets popular for applications that require high strength and reliability.

5. Clips and Clamps:

Clips and clamps offer alternative fastening methods that do not involve the use of threaded or riveted elements. They provide quick assembly and disassembly capabilities, making them ideal for applications where temporary or repetitive connections are required. Examples include spring clips, snap-fit connectors, hose clamps, and quick-release mechanisms. These fasteners enhance efficiency while maintaining stability.

6. Anchors:

Anchors are specialized fasteners used to secure objects to hollow structures or surfaces with poor load-bearing capacity. Common types of anchors include wall plugs, expansion anchors, screw anchors, toggle bolts, and chemical anchors. By distributing load forces over a broader area, anchors significantly increase the holding power and ensure structural integrity.

7. Inserts:

Inserts are fasteners used to reinforce threads within materials that may have weak threads or need frequent rethreading due to wear. Threaded inserts can be installed permanently or temporarily and provide robust threads for screws or bolts to engage in. Various insert designs cater to specific applications, including heat-set, press-fit, self-tapping, and coil/thread repair inserts.


Fasteners play a crucial role in CNC machining, providing secure connections between components and ensuring the functionality and longevity of finished products. With an extensive range of fastener options available, manufacturers can select the most suitable type based on factors such as load-bearing requirements, material compatibility, ease of installation/removal, and cost-effectiveness. Understanding various fastener types empowers designers, engineers, and manufacturers to make informed decisions when producing CNC machined products, ultimately leading to improved quality and customer satisfaction. CNC Milling