A Comprehensive Guide to Types of Fasteners in CNC Machining--cncmass.com(what are torsion snap joints used for Troy)

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CNC (Computer Numerical Control) machining has revolutionized the manufacturing industry by providing precise and efficient production techniques. It involves automated machines controlled by computers to cut, shape, and create various components from various materials. One crucial aspect of this process is fasteners, which are essential for holding different parts together securely. This article will explore the different types of fasteners used in CNC machining and their significance in assembling high-quality products.

Types of Fasteners in CNC Machining:

1. Screws:
Screws are widely used fasteners in CNC machining due to their versatility and ease of use. They are available in numerous varieties, including machine screws, self-tapping screws, set screws, and wood screws. Each type serves a specific purpose based on material compatibility, application, and load-bearing capacity. Screws provide strong connections between components and can be easily tightened or loosened using appropriate tools.

2. Bolts:
Bolts are similar to screws but usually require nuts for tightening. They typically have a threaded shaft with a head at one end and are commonly hexagonal or square-shaped for easy maneuverability. Bolts offer greater strength and security compared to screws and are extensively used in heavy machinery, automotive industry, and construction projects where stability and durability are paramount.

3. Nuts:
Nuts complement bolts as they are used to secure them in place. In CNC machining, different nut types such as hex, flange, wing, and lock nuts are utilized depending on the application requirements. These nuts are threaded internally, allowing for a tight grip when fastened with bolts. Nut-bolt combinations enable multiple components to be tightly joined together, ensuring structural integrity and preventing unwanted movement.

4. Washers:
Washers play a critical role in CNC machining as they distribute the load evenly across surfaces and protect against damage caused by excessive pressure or vibration. Different types of washers, including flat, lock, and spring washers, are used depending on the specific application. Flat washers provide increased surface area for load distribution, lock washers prevent loosening due to vibrations, and spring washers provide a constant tension force.

5. Rivets:
Rivets are permanent fasteners commonly used in aerospace and automotive industries, where lightweight and robust joining solutions are required. They consist of a cylindrical shaft with a flanged head that deforms when installed, creating a secure connection. The rivet end is typically hammered or pressed to expand it against the workpiece, ensuring a tight joint. Riveting machines perform this process quickly and efficiently during CNC machining.

6. Clips:
Clips, also known as retaining clips or circlips, are vital fasteners used to secure rotating components such as gears, pulleys, or bearings on shafts. These circular metal rings fit into grooves precisely machined on their mating surfaces, preventing accidental dislodgment or damage to machinery. Snap rings and E-clips are common variants of clips utilized in various industrial applications requiring quick assembly and disassembly.

7. Anchors:
Anchors find extensive use in CNC machining for securing objects to walls or other structures. Whether it's hanging shelves, mounting heavy equipment, or fixing electrical boxes, different anchor types like sleeve anchors, drop-in anchors, and wedge anchors ensure stability and reliability. Their design allows them to grip solid materials firmly, even when subjected to substantial loads and vibration.


Fasteners play an integral role in CNC machining, providing the necessary strength and stability to assembled products. From screws and bolts to nuts and washers, each type serves a unique purpose based on the requirements of the application. Understanding the different types of fasteners available ensures appropriate selection and reliable connections in CNC machining processes, leading to high-quality, durable, and safe end products. CNC Milling CNC Machining