Exploring the Types of Fasteners in CNC Machining--cncmass.com(different kinds of springs Cathy)

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In the world of manufacturing, precision and efficiency are paramount. CNC (Computer Numerical Control) machining has revolutionized the way we produce complex parts with utmost accuracy and consistency. Central to this process are various types of fasteners that play a crucial role in securing and assembling components together. In this article, we will delve into the realm of CNC machining and explore the different types of fasteners used in this advanced manufacturing technique.

1. Nuts and Bolts:

The most common and widely recognized type of fasteners are nuts and bolts. These versatile fasteners provide an essential means for joining two or more components securely. Bolts have a threaded shank along their entire length, while nuts possess internal threading designed to match those on bolts. When tightened together, they create a strong connection between parts, ensuring stability in the assembled structure.

2. Screws:

Screws are similar to bolts but tend to be smaller in size. They feature helical ridges known as threads on their cylindrical body. Unlike bolts, screws typically engage directly with the material being fastened rather than employing nuts. Varieties such as wood screws, machine screws, self-drilling screws, and sheet metal screws are all utilized based on the specific application requirements in CNC machining.

3. Rivets:

Rivets are permanent fasteners commonly employed where disassembly is not required. A rivet consists of a tubular body and a solid mandrel. During installation, the mandrel is pulled through the tubular body, creating a pressure fit and expanding the opposite end to secure two or more materials tightly together. Riveted joints exhibit excellent shear strength, making them ideal for applications subject to constant loads.

4. Snap Rings:

Snap rings, also called retaining rings, are circular fasteners fitted onto shafts or inside bores to restrict axial movement. These rings come in various designs, such as external snap rings and internal snap rings, depending on their application. CNC machining incorporates snap rings to secure bearings, gears, or housings in place without the need for additional components like nuts or bolts.

5. Washers:

Washers are thin metal discs with a hole in the center used to distribute the load between fasteners and the assembly surface. They act as spacers, prevent damage, and reduce friction between parts, enabling smooth operation. Depending on the requirement, plain washers, lock washers, spring washers, and more can be utilized during CNC machining processes to reinforce joints and minimize motion-induced wear and tear.

6. Inserts:

Inserts play a vital role in reinforcing threaded joints within CNC machined components. These cylindrical brass or stainless steel inserts have internal threads that serve as reinforcements when installed into plastic or soft materials. They provide additional strength and durability, allowing reliable assembly of fasteners even in softer substrates.


CNC machining has brought precision manufacturing to new heights, making it possible to produce complex parts with unmatched accuracy. While there are numerous types of fasteners employed in this process, including nuts and bolts, screws, rivets, snap rings, washers, and inserts, each serves its distinct purpose in ensuring sturdy connections. Understanding the variety of fasteners available helps optimize design choices, ultimately leading to impeccable products created through CNC machining methods. CNC Milling CNC Machining