Exploring the Different Types of Fasteners Used in CNC Machining--cncmass.com(parting line injection molding Sigrid)

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CNC (Computer Numerical Control) machining has revolutionized various industries by providing accurate and efficient manufacturing capabilities. One crucial aspect of the CNC machining process is fasteners, which play a vital role in ensuring stable and secure assemblies. In this article, we will delve into the world of fasteners used in CNC machining, exploring their types, functionalities, and production processes.

Types of Fasteners commonly used in CNC Machining:

1. Screws:
Screws are versatile fasteners utilized for securing two or more components together. They come in diverse forms such as machine screws, self-tapping screws, socket head cap screws, and set screws. The production of screws involves using raw materials like stainless steel, carbon steel, or brass that are forged, threaded, heat-treated, and coated to enhance durability and endurance.

2. Bolts:
Bolts are similar to screws but generally feature a hexagonal head and require a nut for fastening. Common varieties include carriage bolts, eye bolts, and anchor bolts. The manufacturing process of bolts includes forging or machining the heads, threading the shank, and applying finishes for corrosion resistance.

3. Nuts:
Nuts are internally threaded fasteners used in conjunction with screws or bolts to create strong connections. Examples encompass standard nuts, lock nuts, wing nuts, and T-nuts. These are usually created through machining or casting methods and undergo treatments like heat treatment, plating, or coating to augment their strength and longevity.

4. Washers:
Washers are thin plates typically placed beneath nuts or bolt heads to distribute pressure and prevent damage to surfaces. Flat washers, split lock washers, and toothed lock washers are common variations. Manufacturing washers involves cutting them from larger sheets of metal followed by forming, punching, and deburring to achieve the desired shape and smoothness.

5. Rivets:
Rivets are permanent fasteners used when welding or screwing is not appropriate. They consist of a cylindrical shaft with a head at one end that expands upon installation to secure two or more components together. Manufacturing rivets involves cold-heading, forming the head, threading if necessary, and applying coatings for corrosion resistance.

6. Pins:
Pins play an essential role in CNC machining by aligning and connecting parts accurately. Examples include dowel pins, clevis pins, and cotter pins. Their production typically involves cutting raw materials into desired lengths, milling grooves for circlips, drilling holes for split pins, and undergoing heat treatment processes.

7. Clips:
Clips serve as quick connectors and retainers in various applications. Spring clips, retaining rings, and E-clips fall into this category. The manufacturing process includes stamping, bending, shaping, or molding metal strips or wire forms to achieve the desired clip design.


Understanding the different types of fasteners used in CNC machining is crucial for producing robust assemblies and ensuring mechanical stability. By utilizing screws, bolts, nuts, washers, rivets, pins, and clips appropriately, manufacturers can create reliable products across industries ranging from automotive and aerospace to electronics and machinery.

With advancements in precision machining techniques and innovative material options, these fasteners undergo rigorous production processes involving forging, machining, threading, heat treatment, coatings, and more. Each step contributes to their durability, strength, anti-corrosive properties, and aesthetic appeal.

Whether you're working on a small-scale project or a large industrial application, choosing the right fasteners plays a pivotal role in achieving successful CNC machining outcomes. So, next time you engage in CNC machining, remember to pay attention to selecting the ideal fastener type for your specific requirements. CNC Milling