What are the charge/power connector of restaurant order pagers / buzzers called?

Question

They look like snap buttons and used for stacking pagers for charging.
Closest things I can find are socket screws and cap nuts.

Mahendra Gunawardena · Accepted Answer

The following pins appear to be pogo pins or spring loaded pins

Below are example of pogo pins

The following appear to be swage mount connectors

Here is an example

Reference:

Mill-max
How to pair the Retekess SU-668 Restaurant Paging System

One Answer