Exploring the Key Types of Fasteners in CNC Machining--cncmass.com(die cast mold Adela)

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Fasteners are vital components used in various industries, construction projects, and manufacturing processes. These small yet mighty devices play a significant role in holding together different parts, ensuring stability, and increasing overall functionality. In the realm of CNC machining, an advanced manufacturing process that utilizes computer-controlled tools to produce precise parts, fasteners are indispensable. This article aims to delve into the different types of fasteners commonly employed in CNC machining and shed light on their production methods.

1. Screws:
Screws are versatile fasteners widely used in CNC machining for joining two or more components firmly. Common screw types include machine screws, self-tapping screws, wood screws, and sheet metal screws. The production of screws involves several steps:
- Material selection: Stainless steel, brass, aluminum, and steel alloys are typically chosen for screw fabrication.
- Cold Heading: The selected material undergoes a cold heading process where it is transformed into a head shape using punch and dies.
- Threading: Threads are created by cold rolling, which strengthens the screws while providing excellent grip.

2. Bolts:
Bolts share similarities with screws but are primarily utilized to secure larger structures due to their increased strength. There are numerous types of bolts, including hex bolts, carriage bolts, and anchor bolts. Producing bolts involves similar steps as screws, involving material selection, cold heading, threading, and heat treatment to increase hardness and tensile strength.

3. Nuts:
Nuts complement screws and bolts, securing them in place. They come in various designs, such as hex nuts, wing nuts, and acorn nuts. Manufacturing nuts entails selecting suitable materials like stainless steel, brass, or carbon steel. Production methods involve hot forging, followed by machining to achieve the desired dimensions and threads. Heat treatment is carried out to enhance toughness and durability.

4. Washers:
Washers are critical components that distribute the load evenly when fasteners are tightened. These flat, round discs prevent damage and ensure stability. Common types of washers include flat washers, lock washers, and split washers. Depending on the material chosen, washers can be produced through stamping or machining processes.

5. Rivets:
Rivets are permanent fasteners widely used in CNC machining for connecting metal sheets or structures. They consist of a cylindrical shaft with a head on one end. The installation process involves drilling holes through the parts to be joined, inserting the rivet through the holes, and deforming its unheaded end to secure the connection. Various materials like aluminum, steel, or brass can be used, and rivets may come as solid or blind (pop) rivets.

6. Inserts:
Inserts provide strong threads in less durable materials, such as plastic or wood. Also known as threaded inserts, they can be installed using heat or ultrasonic methods. Available in different forms, including helical, key-locking, and press-fit, inserts enhance the strength and longevity of connections within CNC-machined products.


Fasteners play an integral role in CNC machining by ensuring the structural integrity and functionality of fabricated parts. Screws, bolts, nuts, washers, rivets, and inserts are just some of the important types of fasteners utilized in this advanced manufacturing process. Understanding their production methods and employing the appropriate type for specific applications is crucial for achieving accurate and reliable results in CNC machining. By choosing the right fasteners, engineers can optimize the performance and durability of their creations across various industries and projects. CNC Milling CNC Machining