Understanding Different Types of Fasteners in CNC Machining--cncmass.com(copper vs bronze Ogden)

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CNC machining plays a crucial role in the manufacturing industry, allowing for precise and efficient production of various parts and components. One essential aspect of CNC machining is fasteners, which are indispensable for securing joints and ensuring structural integrity in numerous applications. In this article, we will delve into the different types of fasteners used in CNC machining and explore their importance in product development.

1. Screws:

Screws are one of the most commonly used fasteners in CNC machining. They consist of a threaded shaft with a head at one end and a pointed tip (or threads) at the other. The threading allows screws to effectively engage with corresponding tapped holes or nuts, providing excellent grip and strength. Manufacturers can choose from a variety of screw types, including machine screws, self-tapping screws, wood screws, and sheet metal screws, depending on the specific application requirements.

2. Bolts:

Bolts are similar to screws but differ primarily in their usage. Unlike screws that have preformed female threads, bolts require an accompanying nut for proper functionality. Bolts typically feature a non-threaded shank along their length, ending in a threaded section near the head. This enables them to pass through aligned holes in multiple components while secured by the nut. Common bolt variants include hex bolts, carriage bolts, eye bolts, and U-bolts.

3. Nuts:

Nuts are integral components in conjunction with bolts, used to secure objects together tightly. These small, usually hexagonal-shaped fasteners contain internal threads that match those of bolts. When combined, the threads of bolts and nuts interlock, creating a firm connection between two or more components. High-strength nuts such as lock nuts, wing nuts, flange nuts, and cap nuts offer added security against loosening due to vibrational forces.

4. Rivets:

Rivets have been used for centuries and continue to be crucial fasteners in modern CNC machining. They are typically comprised of a cylindrical shaft with a head at one end, resembling nails without sharp points. During the installation process, rivets are inserted into pre-drilled holes and then deformed or expanded using specialized tools like rivet guns. This deformation secures two or more materials together permanently. Popular types include solid rivets, blind rivets, and tubular rivets.

5. Washers:

Washers provide stability, distribute loads evenly, and protect surfaces from damage due to fastening processes. These thin, flat discs often feature a centrally located hole through which bolts or screws pass. By sandwiching between the fastener head/nut and the workpiece, washers prevent damage caused by excessive pressure and ensure consistent tightening torque. Varieties of washers include flat washers, lock washers, fender washers, and spring washers.

6. Anchors:

Anchors are vital fasteners used when securing objects to concrete, brick, or other masonry-like materials. These expandable devices facilitate stable attachments where traditional fastening methods may not suffice. Common anchor types include expansion anchors, sleeve anchors, drop-in anchors, and wedge anchors. This diversity allows manufacturers to choose the most appropriate anchoring method based on load requirements, base material, and installation convenience.


In the realm of CNC machining, choosing the right fasteners is essential for ensuring the structural integrity and reliability of the final product. The various types of fasteners available, such as screws, bolts, nuts, rivets, washers, and anchors, cater to different functional and design demands. Manufacturers must carefully consider the application, environmental factors, load-bearing capacity, and compatibility between mating parts when selecting the appropriate fastener type. By understanding these different types of fasteners and their functionalities, engineers and designers can optimize their CNC machining processes and deliver high-quality, durable products. CNC Milling