A Comprehensive Guide to Types of Fasteners in CNC Machining--cncmass.com(car screws Derrick)

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Types of fasteners play a crucial role in the field of CNC machining, contributing to the successful production and assembly of various products. From automotive parts to aerospace components, fasteners ensure secure joints that withstand rigorous use. This article aims to provide an insightful overview of different types of fasteners used in CNC machining as well as their manufacturing processes.

1. Bolts:
Bolts are one of the most common types of fasteners employed in CNC machining. They consist of a cylindrical shaft with external threading and a head at one end. When producing bolts through CNC machining, manufacturers start with a solid metal rod and cut it into desired lengths using automated cutting tools. Next, they utilize milling or lathe machines to create threads evenly along the shaft's surface. The final process involves adding the bolt head, often by welding or cold forming.

2. Screws:
Screws differ from bolts primarily due to their helical structure and tapered ends. They possess internal threading and require matching nuts for proper functionality. To manufacture screws, CNC machines play a vital role. Initially, manufacturers obtain blanks made from stainless steel, aluminum, or other materials. These blanks are then subjected to turning operations within CNC lathes to form precise screw threads across the entire length. Subsequently, the heads of the screws are shaped, typically by employing milling techniques.

3. Nuts:
Nuts complement bolts and screws, providing efficient locking mechanisms when paired together. In CNC machining, nuts commonly undergo turning operations to achieve the desired thread pattern internally. Lathes remove excess material gradually until the correct diameter is achieved. Following this, threading is added with cutting tools aided by computer-controlled movements. Some nuts may further undergo heat treatment for increased hardness and durability.

4. Washers:
Washers are disc-shaped fasteners that assist in distributing loads and preventing damage to surfaces. CNC machines aid in the precise production of washers through cutting, drilling, or punching techniques. Depending on the desired specifications, manufacturers can choose various materials such as steel, brass, aluminum, or plastic sheets. These materials are then subjected to specific machining processes to shape them into circular discs with a centered hole.

5. Rivets:
Rivets are permanent fasteners used for joining two or more components together permanently. They consist of a cylindrical shaft with heads at both ends. Producing rivets via CNC machining involves several steps. Initially, solid rods made from steel, copper, or aluminum undergo precision turning operations using lathes to create smooth and consistent surfaces. The ensuing process focuses on adding heads to the shaft, which may involve heating and hammering or using specialized forming dies within a press machine.


In the world of CNC machining, understanding different types of fasteners is essential for successful product manufacturing. From bolts and screws to nuts, washers, and rivets, each plays a unique role in securing components in place. In this article, we explored the production processes involved in creating these critical fasteners. Manufacturers rely on advanced CNC machines to produce fasteners accurately, efficiently, and up to industry standards. By utilizing the right type of fastener for specific applications, engineers can ensure robust assemblies that resist external forces, resulting in reliable and durable end products. CNC Milling