Overview of Types of Fasteners for CNC Machining(6061 aluminum vs 7075 Norton)

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In the world of manufacturing, CNC machining has revolutionized how products are made. With its precise and efficient capabilities, it has become a go-to method for producing various components for different industries. One crucial aspect of CNC machining is the use of fasteners that hold the parts together securely. In this article, we will explore the different types of fasteners commonly used in CNC machining processes.

1. Screws:
Screws are one of the most widely used fasteners in CNC machining. They come in various sizes and shapes, each serving specific purposes. For instance, flathead screws sit flush with the surface, while pan head screws have rounded tops that protrude slightly. Additionally, countersunk screws are designed to be embedded into the material, creating a smooth finish. CNC machines accurately create these screw holes, ensuring consistent results every time.

2. Bolts:
Similar to screws, bolts are sturdy metal fasteners that secure two or more objects together through pre-drilled holes. Unlike screws, bolts require nuts to provide additional stability. CNC machining ensures precise alignment of the holes, allowing the bolts to fit perfectly. Commonly used bolt types include hex bolts, carriage bolts, and eye bolts, each suitable for specific applications based on their designs and functionalities.

3. Nuts:
Nuts play a vital role in CNC machining as they complement bolts and serve as thread counterparts to achieve a secure connection. Nuts also come in various forms, such as hex nuts, wing nuts, and lock nuts. The CNC machining process ensures accurate threading so that nuts easily glide onto bolts, promoting sturdy connections between different components.

4. Washers:
Washers are not only essential in distributing the load but also safeguarding surfaces from damage caused by friction during tightening. CNC machining allows for precision when manufacturing washers, leading to a perfect fit around screw heads or between nuts and surfaces. Flat washers, lock washers, and spring washers are among the commonly used washer types in CNC machining.

5. Rivets:
Riveting is a popular method for fastening materials that cannot accommodate screws or bolts due to their thickness or composition. In CNC machining, rivets can be created with precision holes suitable for inserting and securing them permanently. Pop rivets, blind rivets, and solid rivets are some examples of rivet types widely utilized in various industries.

6. Pins:
CNC machining also enables the fabrication of different types of pins used as fasteners. Commonly utilized pins include dowel pins, clevis pins, and cotter pins. Dowel pins help align two objects precisely, maintaining their relative positions. Clevis pins consist of a head and cross-drilled hole, allowing easy attachment of components. Cotter pins, on the other hand, secure parts by passing through a drilled hole and being held in place with wire loops.


Fasteners play a significant role in CNC machining as they ensure the integrity and functionality of the final product. Screws, bolts, nuts, washers, rivets, and pins collectively enable the assembly of various components securely. The precision afforded by CNC machining allows for consistent production of accurate fittings, resulting in reliable connections that withstand demanding environments.

As technology continues to advance, CNC machining will likely evolve further, improving its capabilities and expanding the range of fasteners that can be produced. Understanding these essential elements assists manufacturers in selecting appropriate fasteners based on specific applications, ensuring sturdy and dependable products across diverse industries. CNC Milling CNC Machining