That would be the head of the screw.
The top part of a wave is called the crest, while the bottom part is called the trough.
The top part of a tornado is called "the top"
The top part of a dress is called the bodice.
The bottom part of your hand is the Palmar sideand the top part is the Dorsal side.
The top part of a shirt is called the collar. It is the part that goes around the neck area.
Denominator. The top part is called the numerator.
The top part of a wave is called the crest. It is the highest point of the wave above the rest position.
The top part of a stalk would be the terminal bud or leaf.
The top part of a shoe is called the upper
The top part of a fraction is called the numerator.
The part of the high top that you pull up in the front is called the tongue. This part is also found on shoes that are not high top styles and is a standard part for almost any sneaker.
Thigh.