The Bolt Strength Comparison guide from Allfast Solutions NZ helps you understand how different bolt grades perform under stress. Strength matters, and knowing the difference between grades like 4.6, 8.8, 10.9, and 12.9 can make all the difference in the safety and reliability of your project.
This comparison makes it easy to identify which bolt suits each application — whether you’re securing structural steel, assembling heavy machinery, or completing precision fabrication work. Each grade represents specific levels of tensile and yield strength, giving you clear guidance on performance and durability.
Tables comparing common bolt grades and strength values
Explanations of tensile, yield, and proof load differences
Material compositions for each grade
Visual charts for quick on-site reference
Tips on choosing suitable bolts for structural or general use
Guidance on torque and tightening for optimal performance
In addition, the guide explains how environmental factors like temperature and corrosion can affect performance. This makes it easier to select not only the right strength grade but also the right coating or material finish. For example, a 10.9-grade bolt in zinc plating may suit indoor use, while stainless steel options work better outdoors or near coastal areas.
At Allfast Solutions NZ, we believe informed choices lead to safer builds. Therefore, we provide accurate data and practical examples so every tradesperson, engineer, and project manager can make confident decisions. We also ensure that our fasteners meet or exceed recognised strength and quality standards.
For more technical detail on strength testing and grade verification, visit the International Organization for Standardization (ISO). Their standards form the basis of global fastener classification systems used across industries.
In summary, this Bolt Strength Comparison guide simplifies technical data into practical insights. It helps you balance strength, safety, and cost — ensuring every connection stands the test of time.
For the best quality stock, competitive pricing, and friendly customer service, look no further than Allfast Solutions.
© 2025, Allfast Solutions