Exploring the Various Types of Fasteners Used in CNC Machining--cncmass.com(sheet metal manufacturing Sarah)

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Fasteners play a crucial role in the realm of manufacturing, particularly in CNC machining. Whether it's assembling components or securing intricate structures, fasteners provide stability and functionality to various applications. In this article, we will delve into the types of fasteners commonly used in CNC machining, uncovering their production methods and highlighting their importance.

1. Screws:
Screws are one of the most widely used fasteners in CNC machining. They consist of a threaded cylindrical shaft and a head, which allows for easy tightening and loosening using compatible tools like screwdrivers or wrenches. The production process involves creating the threads through cutting or rolling methods, resulting in designs such as machine screws, self-tapping screws, and wood screws. These versatile fasteners find utility in automotive, aerospace, and electronic industries, among others.

2. Bolts:
Bolts, often confused with screws, possess key differences that make them suitable for specific applications in CNC machining. Bolts typically feature an unthreaded section known as the shank, which requires a nut for proper fastening. The production process involves heat treatment, forging, threading, and surface finishing stages. Bolts come in several variants, including hex bolts, carriage bolts, and eye bolts, each serving distinct purposes based on load-bearing capacity, installation method, and expected environmental conditions.

3. Nuts:
Nuts complement bolts by providing the necessary grip and holding power when tightened together. These fasteners come in different shapes—hexagonal, square, winged—and work seamlessly with corresponding bolts for secure joint assembly. Manufacturing nuts entails processes such as forging, drilling, and shaping to achieve optimal strength and accuracy. From standard nuts to lock nuts and flange nuts, they cater to diverse industrial demands while ensuring robust connections in CNC machined structures.

4. Washers:
Often overlooked, washers play a crucial role in CNC machining by providing stability, preventing damage or loosening, and distributing loads evenly. These thin metal discs are typically placed between the nut/bolt head and the joint surface. While flat washer types are most common, there are also spring washers that boast elasticity for enhanced vibration resistance. Production methods for washers involve stamping or punching processes, followed by heat treatment to optimize their mechanical properties.

5. Rivets:
Rivets offer a permanent fastening solution for materials that cannot accommodate conventional threaded fasteners like screws or bolts. Comprising a shaft with a cylindrical head, rivets are inserted into pre-drilled holes and mechanically deformed to secure two or more components together permanently. This deformation process creates a bulge on the blind side of the workpiece, forming an effective join. The production of rivets can be done using various techniques such as cold heading and hot forging, leading to different types including solid rivets, semi-tubular rivets, and blind rivets.


CNC machining relies heavily on fasteners to provide strength, stability, and adaptability to diverse applications. From screws and bolts to nuts, washers, and rivets, each type of fastener has its unique characteristics and production methods. Understanding these fasteners' functions helps manufacturers select the right ones based on load requirements, assembly convenience, and desired durability. By incorporating appropriate fasteners into CNC machined structures, industries can ensure reliable and long-lasting connections, enhancing the overall efficiency and safety of their products. CNC Milling CNC Machining