Many traditional fabric fasteners are metal and great for making electrical plugable connections. these include hooks and loops, hook clasp, magnetic clasps and screw and socket clasps, buttons, zippers (with conductive zipper tape from Shieldex)…
These also include metal poppers, which are covered in an extra post.

By felting together natural and steel wool it is possible to make conductive felt and from this a pressure sensitive variable resistor.

This project is a nice project by Thomas Gerhardt using this principal.
>> http://thomas-gerhardt.com/itp/FeltResistor/

Heavy metal beads are great for making tilt sensors. They can be used in combination with smaller metal beads or non-conductive glass, plastic or ceramic beads.

You can also make your own conductive beads, either by shaping them from some stiff metal wire and possibly soldering them to add enough solder to make them heavy. One [...]

also know as: snap, snap fastener, press stud
also see: Tools >> popper machines
Metal poppers are great for making electrical connections. They are traditionally a wearable fastener. They are a washable and reliable connection method.
We have found that not all metal poppers are good for solder to. White bronze, brass, PWP nickle free, silver finish…