Essential Guide to Types of Fasteners in CNC steel Reginald)

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CNC machining plays a pivotal role in various industrial sectors, enabling the precise production of complex parts and components. A critical aspect of CNC machining is the selection and utilization of suitable fasteners. In this article, we will explore different types of fasteners used in CNC machining applications.

1. Screws:
Screws are one of the most commonly used fasteners in CNC machining. They come in various forms such as machine screws, self-tapping screws, socket head cap screws, and set screws. Machine screws have straight shanks with blunt ends and require nuts for secure tightening. Self-tapping screws feature sharp threads that can tap their own holes when driven into materials like plastic or metal. Socket head cap screws have cylindrical heads with an internal hexagon drive, offering greater control during tightening. Set screws do not have heads; instead, they are fully threaded and mainly used for securing one object within another.

2. Bolts:
Bolts serve as robust fastening solutions by combining with nuts to hold two or more objects together. Common bolt variations include carriage bolts, anchor bolts, eye bolts, and hex bolts. Carriage bolts have round heads and square shoulders beneath them, making them ideal for applications requiring smooth finishes. Anchor bolts provide exceptional stability and strength by embedding themselves deeply into concrete surfaces. Eye bolts have a circular, closed-loop at one end for attaching cables or hooks. Hex bolts, also known as hexagon head bolts, possess six-sided heads designed for easy grip and torque application.

3. Nuts:
Nuts are essential complementary elements of bolts, providing threading that allows secure fastening. CNC machined nuts consist of various designs, including hexagonal nuts, wing nuts, acorn nuts, and locknuts. Hexagonal nuts can be tightened using wrenches while providing maximum surface contact for effective load distribution. Wing nuts have projections on the sides, allowing for tool-free manual tightening. Acorn nuts possess a domed shape, ensuring a finished appearance while also providing protection against accidental contact. Locknuts feature integrated mechanisms to prevent loosening due to vibration or external forces.

4. Washers:
Washers act as crucial components in CNC machining applications by distributing loads and preventing damage caused by fastener tightening. Flat washers are used to increase surface area contact between the fastener and the material being secured. Split lock washers have a split design that creates spring-like compression, increasing friction and resistance against loosening. Additionally, toothed lock washers offer similar benefits by having internal teeth for improved grip.

5. Rivets:
Rivets are permanent fasteners widely employed in CNC machining processes, especially when joining materials such as metal sheets and structural components. Common types of rivets include solid rivets, blind rivets, drive rivets, and tubular rivets. Solid rivets require access to both sides of the materials being joined to secure them together permanently. Blind rivets consist of a mandrel and a body, allowing installation from only one side. Drive rivets are simple to install using a hammer or an automated machine without the need for additional tools. Tubular rivets have hollow bodies, enabling wires, cables, or rods to pass through them.


Fasteners play a vital role in CNC machining, acting as integral components in securing various parts and components together. The wide range of fastener types available allows machinists to choose the most suitable options based on specific application requirements. Whether it is screws, bolts, nuts, washers, or rivets, understanding their functions and characteristics ensures optimal performance and reliability in CNC machining projects. By selecting the right type of fasteners and employing proper installation techniques, manufacturers can ensure high-quality, durable products with effective and secure assemblies in CNC machining operations. CNC Milling CNC Machining