Understanding Different Types of Fasteners for CNC Machining--cncmass.com(plastic surface finishes Barnett)

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CNC machining plays a significant role in modern manufacturing processes, enabling the precise and efficient production of various products. In this article, we will explore an essential aspect of CNC machining – fasteners. These small yet critical components are integral to the assembly and functioning of countless products across industries. We will delve into the different types of fasteners commonly used in CNC machining and their respective applications.

1. Screws:
Screws are versatile fasteners with threaded shafts and heads that facilitate secure attachments. They come in numerous variations, including machine screws, wood screws, self-tapping screws, and sheet metal screws. Machine screws are designed for use with internally threaded parts or tapped holes, while wood screws are meant for connecting wooden components. Self-tapping screws are ideal for drilling their own threads into materials such as plastic or metal, whereas sheet metal screws are specialized for use with thin metal sheets.

2. Bolts:
Bolts are similar to screws but require a nut for secure attachment. They feature a partially or fully threaded shaft and often have a hexagonal or square head for tightening using a wrench. Some common bolt types include hex bolts, carriage bolts, and eye bolts. Hex bolts are utilized when strong and reliable connections are needed, while carriage bolts are commonly used in applications requiring smooth finishes. Eye bolts, on the other hand, have a ring-shaped end for attaching ropes or cables.

3. Nuts:
Nuts, paired with bolts or threaded rods, provide tight and secure connections. They vary in shape, including hex nuts, wing nuts, and locknuts. Hex nuts are the most prevalent type, easily tightened using a wrench or pliers. Wing nuts are thumb-operated and allow for tool-free assembly and disassembly. Locknuts incorporate a locking mechanism to prevent unintentional loosening due to vibrations or rotation.

4. Rivets:
Rivets are permanent fasteners often used when welding or screwing is not feasible or required. They consist of a cylindrical shaft, sometimes with flanges on one end, and require access from both sides for installation. Popular types include solid rivets, blind rivets, and tubular rivets. Solid rivets are manually hammered into place, while blind rivets self-pierce the material using a specialized tool. Tubular rivets have hollow shafts, which allow them to be set using a mandrel.

5. Washers:
Washers accompany nuts and bolts to distribute pressure evenly and prevent damage to the connected materials. Flat washers are the most common type and provide a smooth surface beneath the nut or bolt head. Split lock washers offer spring-like tension, reducing rotation or loosening caused by vibrations. Additionally, sealing washers ensure water-tight connections in plumbing applications.


Fasteners are essential components in CNC machining and play a vital role in ensuring strong and secure connections between various parts and components. Understanding the different types of fasteners available, such as screws, bolts, nuts, rivets, and washers, helps to optimize design choices and streamline manufacturing processes. By utilizing the right fastener for each application, manufacturers can enhance product durability, reliability, and overall performance. So, whether you're assembling furniture, constructing machinery, or engaging in any CNC machining project, selecting the appropriate fastener ensures both efficiency and longevity. CNC Milling