One part is the HEAD, another is the THREADING and i would guess the other is called the shaft (not sure about that)
The screw part at the end of the headpiece is for tuning.
The 'screw' part, as in 'screw-driver'
The screw part or the part that holds it in place in many cases is a screw, so in that case it could be held up as an example of a screw. I doubt however if a light bulb with a bayonet fitting could be held as an example of a screw.
The part of a screw that is wrapped around the central shaft of the screw is normally called a thread. It can be described technically as an inclined plane.
It's often spelled as "Sloe Comfortable Screw". The 'sloe' is for Sloe Gin (1 part). The 'comfortable' is Southern Comfort (1 part). The 'screw' is the same 'screw' in a screwdriver, Vodka (1 part). Pour the above into a glass with ice. Top up with orange juice and garnish with an orange twist.
The end of a screw is called the "head." It is the part that is turned to drive the screw into a surface. Some common types of screw heads include flat head, round head, and hex head.
Thread
That would be the head of the screw.
The very centre of the bulb itself is the Hot contact. The screw in base is the neutral connection.
Ball screw actuators are used in industrial equipment where precision motion is required. The ball screw assembly rotates the part using the actuator as a pivot.
The hole that you put a screw into is referred to as a "tapped hole". The rib-like things in the hole are called "threads" or, more specifically, "internal threads" as opposed to the external threads on a screw.
No, a screw is actually a part of the "Screw" family of the Simple machines in physics. The six simple machines are: levers, wheel and axel, screws, pulleys, ramp, and inclined planes.