Quality Control

ASTM vs. ISO vs. SAE vs. JIS Fastener Standards: What’s the Difference?

Component Plans with Rulers

When specifying fasteners for engineering projects, understanding the differences between ASTM, ISO, SAE, and JIS standards is critical. These four organizations govern the majority of fastener specifications used worldwide, but each has distinct origins, measurement systems, applications, and grading methods. Here’s what engineers need to know to navigate these standards