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What is Tap Bolt? Dimensions, Properties and Uses

Tap Bolts

Regarding construction and manufacturing, fasteners are one of the most important tools in the toolbox. While there are a variety of fasteners out there, one of the most versatile and useful is the tap bolt. Tap bolts come in various sizes and designs and are used in various industries, from automotive manufacturing to electrical installation. This post will examine tap bolts, their dimensions and properties, and some of the most common uses for this essential fastener.

What is Tap Bolts? 

Tap bolts are threaded fasteners with a tapered, pointed end, making them ideal for penetrating and riveting into thick material. They are usually made from hardened steel that provides superior strength and durability. Tap bolts can secure various materials, including sheet metal, wood, plastic, and concrete. These bolts also come in various sizes so that you can find the perfect size for your project or application.

Dimensions of Tap Bolts:

Tap bolts come in a variety of sizes, ranging from M6 to M20 in diameter (Metric) and from 1/4″ to 3/4″ in diameter (Imperial). Lengths can range from as short as 10mm to as long as 300mm or more. The thread pitch can also vary depending on the size of the bolt. For example, an M6 tap bolt typically has a thread pitch of 1.0mm, while an M20 tap bolt will have a thread pitch of 2.5mm.

Properties of Tap Bolts:

The performance of a tap bolt depends on several factors, including the material it is made from, the diameter and length of the bolt, and the thread pitch. Steel tap bolts are the most commonly used due to their strength and durability, but stainless steel tap bolts are often used in marine applications where corrosion resistance is important. Brass tap bolts are also an option if corrosion resistance is a concern, but strength is not as important. Additionally, tap bolts can be coated with zinc, hot-dip galvanized, or black oxide to improve their corrosion resistance.

Uses for Tap Bolts:

Tap bolts are used in various industries and applications. They are commonly used in automotive manufacturing, electrical installation, and construction. In automotive manufacturing, tap bolts secure engine components, suspension components, and other vehicle parts. In electrical installation, tap bolts attach metal conduits and other equipment to walls and ceilings. In construction, tap bolts are used to secure steel beams, columns, and other structural elements.

How to Choose the Right Tap Bolt:

When choosing a tap bolt, it’s important to consider the dimensions, properties, and intended use of the bolt. The most common sizes and lengths are available from hardware stores and online suppliers. When it comes to the properties of the tap bolt, consider factors such as the strength and corrosion resistance required for the application. Coatings such as zinc or black oxide can also improve corrosion resistance. Finally, be sure to choose a tap bolt that is the right length for your application and the correct thread pitch to match the nut being used.


Tap bolts are essential fasteners used in various industries and applications. They come in various sizes and designs, and their properties can vary depending on the material they are made from and the coating used on the bolt. When choosing a tap bolt, it’s important to consider the dimensions and properties of the bolt, as well as the intended use of the fastener. Doing so ensures that you have the right tool for the job and that your structures and equipment are secure and durable.

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