What's the little piece of plastic called?
perhaps it is a cable protector ...
Wall anchor or Raw plug...many types depending on application and load. Plasterboard wall anchors or Raw plugs come in plastic or metal and different sizes in length and width. Some have expanding actions once into wall having drilled first and lock in on other side of plasterboard. Some have a screw thread that just screw into plasterboard but many types for different applications. In brick the raw plug, wall anchor is not so complicated and can come in metal or plastic...has a grabbing effect on the brick and can take more load generally...standard plugs come in different lengths and width sizes. You have to drill wall first and follow instructions for drill size and application on packet/box.
wall anchor -- they also have metal ones for mason or brick walls ..... If you are hanging things from the walls, look into those new wall hooks from 3M that paste to the wall and you can peel it off so that you do not damage the wall.
