Exploring the Types of Fasteners and Their Role in CNC Machining--cncmass.com(surface finish examples Dean)

  • Time:
  • Click:8
  • source:FANYA CNC Machining


Fasteners play a crucial role in the world of manufacturing and machinery. From automobiles to electronics, buildings to furniture, fasteners are utilized extensively to hold components together securely. When it comes to CNC machining, the types of fasteners used can greatly impact efficiency, precision, and overall quality. In this article, we shall delve into the various types of fasteners commonly employed in CNC machining processes, exploring their characteristics, applications, and production methods.

1. Screws:

Screws are one of the most ubiquitous types of fasteners, consisting of a threaded shaft with a head at one end. They enable easy assembly and disassembly of parts in CNC machining. Common screw types include machine screws, self-tapping screws, and set screws. Machine screws are designed to fit into pre-drilled holes while self-tapping screws create their own threads as they are screwed in. Set screws don't have heads and are mainly used for securing an object within or against another component.

To produce screws, manufacturers often employ several techniques including thread rolling, cold heading, or lathe turning. These processes ensure precise threading and accurate dimensions necessary for efficient fastening applications.

2. Bolts:

Bolts are similar to screws but normally require the use of a nut for secure fastening. They come in a variety of shapes and sizes to handle different loads and environmental conditions. Hex bolts, carriage bolts, and eye bolts are examples of commonly used bolts in CNC machining. Hex bolts are widely used due to their versatility, while carriage bolts feature a smooth rounded head and square shank which prevents them from rotating when tightened. Eye bolts have a looped head, allowing for easy attachment of ropes, cables, or chains.

The production process of bolts involves hot forging or cold heading, followed by machining operations such as drilling, tapping, and chamfering to meet specific requirements.

3. Nuts:

Nuts are internally threaded fasteners used in combination with bolts to create secure joints. They come in various forms including hex nuts, locknuts, wing nuts, and square nuts. Hex nuts are the most common type, featuring six sides for easy tightening using a wrench or a specialized tool. Locknuts have an additional locking mechanism to prevent loosening due to vibration or prolonged use. Wing nuts offer convenient hand-tightening capabilities without requiring any tools, while square nuts have four equal sides and can be easily gripped during installation.

The production of nuts typically involves cold forging of wire stock followed by thread rolling or machining processes for accurate threading.

4. Rivets:

Rivets are permanent fasteners widely used in applications that require high strength and resistance to vibration or moisture. They consist of a cylindrical shaft and a head, which is deformed after insertion to securely hold two or more components together. Blind rivets, solid rivets, and tubular rivets are commonly utilized in CNC machining. Blind rivets are ideal when access to only one side of the joint is possible, whereas solid rivets provide exceptional strength by passing through holes drilled on both components. Tubular rivets are similar to blind rivets but they possess a hollow shank for special applications such as electronics or light structures.

Production of rivets encompasses several techniques like hot heading, stamping, machining, and finishing operations such as plating or painting to enhance durability and appearance.


In summary, understanding the types of fasteners used in CNC machining processes is crucial for successful assembly and maintenance of machinery and structures. From screws to bolts, nuts to rivets, each fastener serves a unique purpose and requires precise production methods to ensure quality and reliability. By utilizing advanced manufacturing techniques and materials, engineers and manufacturers continue to innovate fasteners, enhancing overall efficiency and performance within the realm of CNC machining. CNC Milling CNC Machining