Exploring the Types of Fasteners in CNC Machining--cncmass.com(automotive nuts and bolts assortment Kennedy)

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CNC machining is a highly efficient and precise manufacturing process used across various industries. One vital aspect of this process is fasteners - essential components that hold different parts together securely. In this article, we delve into the diverse types of fasteners utilized in CNC machining, providing insights on their production methods, functions, and unique features.

1. Bolts and Nuts:

Bolts and nuts are versatile fasteners commonly used in CNC machining. The bolt consists of a threaded shaft with an unthreaded shoulder called the shank, while the nut possesses internal threads. Their primary function is to join two or more parts by applying tension through screwing them together. These fasteners often vary based on size, material, and thread pitch.

Manufacturing Process:
- Initially, bolts are produced from a long cylindrical rod through precision machining.
- Threads necessary for joining purposes are created either by tapping or rolling processes.
- Similarly, nuts are manufactured through turning operations using bar stock materials.
- For specialized applications, heat treatment may be applied to enhance strength and durability.

2. Screws:

Screws are extensively employed within CNC machining due to their exceptional holding power for binding materials closely. They possess external helical threads over the length of their body, enabling secure and resistant connections. Screws come in numerous forms such as wood screws, machine screws, self-tapping screws, and many others, each suited for specific applications.

Manufacturing Process:
- Like bolts, screws begin as long cylindrical rods before undergoing precision machining processes.
- Threads are formed on the screw's body either through cutting or rolling techniques.
- Additional treatments like coating or plating might be added to bolster corrosion resistance or aesthetic appeal.

3. Rivets:

Riveting is a permanent joining method widely implemented in CNC machining. A rivet comprises a head at one end and a deformed tail at the other, forming a rivet joint when properly installed. It provides excellent strength, ensuring structural integrity for various applications ranging from aerospace to automotive industries.

Manufacturing Process:
- Rivets are usually manufactured through cold heading or flash butt welding processes.
- In these processes, metallic wires or rods are accurately cut into specific sizes.
- The ends of the wire/rod are then heated, formed, and shaped as required before hardening them through heat treatment.
- Finally, any excess material is trimmed, resulting in finished rivets ready for installation.

4. Clips and Clamps:

Clips and clamps play a crucial role in securing components together during CNC machining operations. They offer quick and easily adjustable solutions, aiding efficient assembly, disassembly, or repositioning of parts. These fasteners come in a variety of forms like spring clips, C-clamps, toggle clamps, and many more.

Manufacturing Process:
- Clips and clamps are typically fabricated through either stamping or molding techniques.
- Stamping involves cutting the desired shape out of metal sheets using precision dies.
- On the other hand, injection molding is commonly used for manufacturing plastic clips and clamps.


CNC machining relies on a range of fasteners to ensure precision, accuracy, and durability in the final products. Understanding the different types of fasteners, their production methods, and functions enables engineers and manufacturers to select suitable options for various applications. Whether it's bolts and nuts, screws, rivets, clips, or clamps, each type contributes significantly to the success of CNC machining processes by securely holding important components together. CNC Milling CNC Machining