Bolt Grade Markings And Strength Chart PDF – (PRINTABLE)

Bolt Grade Markings And Strength Chart PDF – (PRINTABLE)

Metal bolts are essential components of many items, from furniture to machinery and even vehicles. The grade of a bolt indicates its strength, ensuring it is capable of withstanding the load applied to it. However, with so many different grades and types of bolts available, it can be difficult to tell them apart and find the right one for the job. To help with this, there is a chart with bolt grade markings and strength information which provides an overview of the various types and grades of bolts.

What is Bolt Grade Markings and What does it Tell Us?

Bolt grade markings are a way of identifying the strength of the bolt. The markings usually consist of a series of numbers and letters, which can vary depending on the manufacturer. In general, the markings indicate the grade, thread, and type of bolt, as well as the material from which it is made. For example, a Grade 8 bolt is commonly marked 8.8, indicating an eight-grade bolt made of a medium carbon steel.

What is the Strength of a Grade 8 Bolt?

The strength of a grade 8 bolt is determined by the material from which it is made, as well as the thread size and length. Grade 8 bolts are typically made from medium-carbon steel or alloy steel and have a minimum tensile strength of 150,000 PSI. The thread size and length of the bolt will affect its strength, with longer or wider threads providing more strength.

Printable Chart for Easy Comparison between Metric Bolt Classes and US Grades

Finding the right bolt for the job can be tricky when multiple sizes and grades are available. Fortunately, there is a chart that can help make the job easier. This chart provides an easy-to-understand comparison between metric bolt classes and US grades. The chart shows the bolt grade markings for each class, so it can be used to quickly identify the right bolt for the job.


With the right bolt grade markings and strength chart, it’s easy to find the right bolt for the job. Whether you’re looking for a Grade 8 bolt or a metric bolt, this chart can provide the information you need to find the right product for your application. For convenience, this chart is also available in printable PDF format.

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