Understanding the Various Types of Fasteners in CNC Machining--cncmass.com(facing tool lathe Avery)

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When it comes to CNC machining, fasteners play a crucial role in holding parts together securely. These types of fasteners come in different forms, each designed for specific applications and requirements. In this article, we will delve into the realm of CNC machining and explore the various types of fasteners used in this manufacturing process.

1. Screws:
Screws are one of the most commonly used types of fasteners in CNC machining. They typically consist of an external thread wrapped around a cylindrical shaft with a head on one end. CNC machines create these threads using precision cutting techniques. Screws serve multiple purposes within CNC machining, from holding components in place to providing access points for disassembly or adjustment.

2. Bolts:
Bolts are similar to screws but differ mainly in their purpose. While screws hold items together by threading directly into materials, bolts require threaded holes known as nuts for secure fastening. This makes them highly versatile in applications where structural integrity is paramount, such as assembling heavy machinery or securing critical joints.

3. Nuts:
Nuts accompany bolts and provide the necessary counterpart for threaded connections. Manufacturers produce nuts in a wide array of designs to accommodate varying requirements, including hexagonal, square, wing, and tee-shaped nuts. CNC machining allows precise production of these nuts with accurate thread patterns, ensuring optimum compatibility between the nut and corresponding bolt.

4. Washers:
Washers are essential components that enhance the effectiveness of fasteners in CNC machining. These flat, disc-like objects sit between the fastener's head or nut and the target material surface. Their primary function is to distribute the load evenly across the surface area, reducing the risk of damage and improving stability. Washers can be categorized into several types, depending on their shape and purpose, including flat washers, split lock washers, and spring washers.

5. Rivets:
Rivets offer permanent fastening solutions in CNC machining applications. While screws and bolts allow for disassembly or adjustments, rivets create a permanent connection by deforming the material upon installation. Commonly made of aluminum or steel, these cylindrical shafts with heads on one end are inserted through pre-drilled holes and secured using specialized tools to compress them permanently. Rivets find extensive use in aerospace, automotive, and structural industries.

6. Pins:
Pins are slender pieces of metal designed to secure components together in CNC machining processes. They serve as alignment aids during assembly or act as locking mechanisms. CNC machines accurately produce different types of pins such as dowel pins, split pins, taper pins, and cotter pins, each suited to specific requirements in terms of load-bearing capacity, dimensional accuracy, and corrosion resistance.

7. Clips:
Clips feature in CNC machining as quick-release fasteners commonly used for temporary connections or when frequent access is required. These handy devices can be snapped into place without the need for additional tools, enabling swift assemblies or repairs. Spring clips, hose clamps, and retaining rings are examples of clips used in various CNC machining applications.

8. Adhesive Fasteners:
Adhesive fasteners offer an alternative approach to mechanical fastening methods in CNC machining. These include tapes, adhesives, and bonding agents that create reliable bonds between surfaces. In certain applications where weight reduction is critical, adhesive fasteners provide versatility, increased design options, and improved aesthetics.


CNC machining incorporates a wide range of fasteners, each performing a specific role based on application requirements and operational demands. Understanding the characteristics, functions, and best uses of different types of fasteners is vital for successful manufacturing processes and ensures the integrity and longevity of assembled parts. By leveraging the capabilities provided by CNC technology, manufacturers can achieve precision and efficiency in producing high-quality products across diverse industries. CNC Milling CNC Machining