Exploring Various Types of Fasteners and Their Role in CNC Machining--cncmass.com(rivet vs Scott)

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CNC machining plays a crucial role in the manufacturing industry, allowing for precise and efficient production of intricate parts and components. One key aspect of CNC machining is the use of fasteners, which hold together different elements of a workpiece during the machining process. In this article, we will delve into the world of fasteners and explore various types commonly used in CNC machining.

1. Screws:
Screws are one of the most common types of fasteners found in CNC machining. These cylindrical threaded devices have a distinct helical ridge, known as threads, running along their entire length. They facilitate secure connections between two or more objects by penetrating the surface material through rotational force. Screws come in numerous sizes, head styles (e.g., flathead, roundhead, panhead), and drives (e.g., slotted, Phillips, Allen). Precise selection ensures the optimal connection strength required for specific applications.

2. Bolts:
Similar to screws, bolts consist of a shaft with external threads encompassing its entire length. However, unlike screws, they require an accompanying nut for assembly. When inserted through aligned holes in multiple parts, bolts and nuts generate a clamping force that securely holds the components together. The design allows for disassembly and reassembly without damaging the workpiece, making bolts ideal for projects requiring future maintenance or adjustment.

3. Nuts:
Nuts, as mentioned above, form an essential part of fastener assemblies alongside bolts. They possess an internal threading pattern that matches the corresponding bolt's outward threads. By rotating the nut onto the bolt, it creates firm interlocking contact, ensuring the overall stability of the structure under mechanical stress. Nuts may come in various shapes, such as hexagonal, square, or winged, enabling ease of handling and providing stability when tightened using tools like wrenches or drivers.

4. Rivets:
Rivets are permanent fasteners commonly used in CNC machining applications where disassembly is not required. They consist of a cylindrical shaft and a head, with the rivet being inserted into pre-drilled holes. Once installed, the unexpanded end of the rivet is deformed or expanded to hold together multiple parts firmly. The process of deformation secures the components, making rivets ideal for joining thin sheets or materials that cannot withstand excessive heat or stress.

5. Washers:
While washers may seem simple, they have an important role in CNC machining applications. These small discs made of various materials (e.g., metal, plastic) help distribute loads to protect surfaces from damage caused by uneven pressure or friction between fasteners and workpieces. Furthermore, washers can prevent loosening due to vibration by providing a cushioning effect that reduces wear over time.


Fasteners are indispensable components in CNC machining, ensuring the integrity and functionality of assembled structures. Screws, bolts, nuts, rivets, and washers all serve specific purposes, offering strength, flexibility, permanence, or ease of assembly/disassembly as required. By understanding the different types of fasteners available and their corresponding applications, manufacturers can harness the power of CNC machines effectively, producing high-quality products efficiently while guaranteeing structural stability. CNC Milling CNC Machining