Pogo pin

Spring-loaded pins are precision parts fabricated with a turning and spinning process which does not require a mold, thus allowing the production of smaller quantities at a lower cost.

[3] Since a spring-loaded pin needs to have a slight gap between the plunger and barrel so that it can slide easily, momentary disconnections can happen when there is vibration or movement.

[citation needed] Many manufacturers have created their own proprietary variations on this design, most commonly by varying the interface between the plunger and spring.

[4] The plunger and barrel of pogo pins usually use brass or copper as a base material on which a thin layer of nickel is applied.

[6] When used in the highest-performance applications, pogo pins must be very carefully designed to allow not only high reliability across many mating/unmating cycles but also high-fidelity transmission of the electrical signals.

[citation needed] Spring-loaded connectors may be combined with magnets to form a strong and reliable connection – a technique which has been employed extensively for consumer electronics such as 2-in-1 PCs and high-frequency data transfer.