A pogo pin, also known as a needle roller, is a type of fastener used to connect two or more machine parts. They are called "pogo pins" because they contain a spring that expands when inserted. However, the springs are really about their size, they are wider than the insertion hole.

The mechanics of pogo pins
The pogo pins will work even if the pogo pins are wider than the insertion holes because they deform and then expand. They have at least one chamber that allows them to enter the cargo compartment. Once inside, the spring pin expands so that it presses against the inside wall of the hole. This compression will continue to occur until the spring pin reaches the same diameter as the hole.

Coil pogo pin
The most common type of spring pin is coiled. Also known as a coil spring pin, it has a coil spring that expands when inserted into a hole. They are made by forming a metal strip into a spiral shape. Once inserted, the coil spring pin will begin to expand, creating a firm and secure environment for connected machine components.

There are three standards for making coil spring pins, these standards include: ISO 8750, ISO 8748, ISO 8751