Exploring the Various Types of Fasteners in CNC Machining--cncmass.com(7075 aluminum vs 6061 Truman)

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Fasteners play a vital role in the world of manufacturing and engineering, especially in processes like CNC machining. These small but crucial components hold together different parts, enabling them to function as intended. In this article, we will delve into the various types of fasteners commonly used in CNC machining, shedding light on their significance and production methods.

1. Bolts:
Bolts are one of the most common types of fasteners used in CNC machining. They consist of a threaded cylindrical shaft with a head at one end. The other end is either threaded or left unthreaded, depending on its application. Bolts are produced by hot forging or cold heading followed by threading using dedicated machinery.

2. Screws:
Similar to bolts, screws have threaded shafts, but they differ in their purpose. While bolts bind objects together through nuts, screws are designed to form their own mating threads within pre-drilled holes. Screw production involves the use of thread rolling machines that shape helical ridges along the shaft, providing an efficient way to fix components.

3. Nuts:
Nuts are matched counterparts for bolts and screws. They come in diverse shapes and sizes such as hexagonal, square, round, or winged, catering to specific applications. Manufacturing nuts generally involves CNC lathing and milling techniques, where raw materials go through precision cutting and shaping processes.

4. Washers:
Washers serve multiple functions in CNC machining. Acting as spacers between surfaces, washers help distribute loads evenly and prevent surface damage. They can also act as locking devices when combined with nuts or provide insulation against electrical currents. Washers are typically manufactured through stamping or laser cutting processes from sheet metal stock.

5. Rivets:
Rivets are permanent fasteners extensively used in CNC machining. They feature a smooth cylindrical body with a formed head at one end. Unlike bolts or screws, rivets do not require access to both sides of the assembly during installation since they are set in place by deforming the tail-end using specialized tools. Rivets can be made from various materials such as aluminum, steel, or copper.

6. Pins:
Pins are versatile fasteners used for joining components together or acting as pivot points within a mechanical system. They come in different forms like straight dowel pins, taper pins, and split pins. Pin production involves CNC turning or machining processes to achieve precise dimensions and tolerances.

7. Clips:
Clips are spring-like fasteners designed to hold objects securely but allow easy disengagement when required. Common examples include retaining clips and circlips, which fit into grooves on shafts or within bores to provide axial retention. Manufacturing clips usually entails wire forming techniques followed by heat treatment to enhance their spring properties.

8. Anchors:
Anchors are specialized fasteners used to secure components to walls, floors, or other surfaces. Common types include wall anchors, expansion anchors, and concrete anchors. The production of anchors involves casting or forging processes, depending on the design requirements and load-bearing capabilities.


Fasteners are indispensable components in CNC machining, providing robust connections between parts to create intricate assemblies. Bolts, screws, nuts, washers, rivets, pins, clips, and anchors all serve specific purposes in different applications. Understanding the characteristics and manufacturing methods associated with each type is crucial for optimizing performance and ensuring reliable joinery in CNC machined products. CNC Milling CNC Machining