3.81 mm terminal block

What are the differences and uses of 3.5mm, 3.81mm, 5.0mm, 5.08mm, 7.5mm, 7.62 mm PCB terminal blocks
Types of 5.08mm Pitch Pluggable PCB Terminal Blocks
Why the 5.08 mm Terminal Block is a Game Changer in IoT Systems
The Role of Screw Terminal Blocks in Automation Applications