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What is a Fastener?

A fastener is a non-permanent or permanent mechanical tool that rigidly connects or affixes two surfaces or objects together. Non-permanent fasteners can easily be removed without damaging the joined materials. The removal of permanent fasteners might require substantial force and might damage the connected surfaces. Permanent fasteners are designed to be a long lasting form of secure connection.

The wide range of fasteners includes screws, nails, nuts, bolts, and washers that come in different sizes, types, and configurations. Fasteners are one of the most used tools for building, fabricating, and configuring a variety of products and industrial equipment.

There are an endless number of shapes, sizes, lengths, and varieties of fasteners that range from the common nail to huge bolts to hold heavy duty manufacturing equipment in place. They can be generic or specially designed to fit an application. Every industry and manufacturer has a different and unique use for these valuable tools.

The variability between fasteners is due to the extreme forces that are placed on them. The purpose of fasteners is to hold parts, components, and pieces of machinery together in the presence of excessive vibrations and pressure while retaining the ability to disassemble the pieces when necessary.

There are several ways to separate, classify, and categorize fasteners, which include permanent and non-permanent as well as threaded and non-threaded. In the permanent classification are rivets and couplings that cannot be removed. Screws and bolts fall into the threaded classification, while dowel pins and blind fasteners are non-threaded and permanent.

Non-Permanent Threaded Fasteners

Bolts

Bolts are one of the more common types of Fasteners and are used to hold two non-threaded pieces together. The head of a bolt, which comes in several varieties, is attached to the threaded male end. Bolts are classified by their shape and type of head.

Anchor Bolts

Anchor bolts are referred to as "cast in place," which means they are included in the fabrication of the component or part and are permanently attached to it. Different types of anchor bolts are designed for specific jobs. They are an industrial bolt that has been embedded into concrete for securing columns and supports to foundations.