Hinge.
A narrow piece of wood or metal used to join pieces is called a dowel. Dowels are commonly used in furniture making and carpentry to strengthen joints and provide additional support.
That metal piece is typically called a "drip edge." It is installed under the window sill to help direct water away from the window and prevent it from seeping into the wall or foundation of the house.
The metal piece that fastens the handle to the tang is called a rivet. Rivets are permanent mechanical fasteners that hold the handle securely in place on the blade of a knife or tool.
The earth's crust is broken into sections called tectonic plates, which slowly move around.
its a piece of curved metal with another piece of metal going through it at the top
fuse
A sharp metal piece is typically called a "metal shard" or a "metal splinter."
The metal part of a pencil is called a ferrule.
it is called a meteorite
Escutcheon
bit
A small piece of metal is commonly referred to as a "metal fragment" or simply a "metal piece." In manufacturing and engineering contexts, it may be called a "metal shaving" or "metal chip." These terms are often used to describe tiny, often unintended, pieces of metal that have broken off from a larger object.
Galley's
The part that holds the eraser on is called "ferrule" and the part you write with is normally graphite, but sometimes is lead or charcoal.
The piece of metal is called a ferromagnetic material, and the phenomenon where it becomes magnetized when an electric current flows around it is known as electromagnetism.
The metal piece that holds the bulb in place is called a socket. It provides electrical contact to the bulb and secures it in position within the light fixture.
The Valve is the piece that actually moves in and out, or "opens and closes" - the part of the block that the valve rests on is called the valve seat.