What is the difference between metric and standard fasteners?

How to tell if a bolt is metric or SAE based on its dimensions - Quora

Introduction to Nut and Bolt Sizes

Understanding metric hardware, Articles

Bolt Specific Standards

ISO Metric Screw Thread Tolerances

Screw, Bolt & Nut library resource? - SketchUp - SketchUp Community

What is the difference between metric and standard fasteners

What's The Difference Between Metric And Standard Bolts

Thread Pitch Vs. Threads Per Inch (TPI) - Albany County Fasteners

Hex Bolts & Screws - J C Gupta & Sons