No such term used.
the pin part of a brooch is called the clasp
The pin on a sundial is called the gnomon. It is the part that casts a shadow on the dial face, indicating the time of day based on the position of the sun.
The pin of a sundial is called a gnomon. It is the part of the sundial that casts a shadow onto the dial face to indicate the time.
The top of the pin is called the head of the pin.
Go to a gunsmith
An oar pin is also called a rowlock pin or a thole.
The sharp end of a pin is called the "point." This is the part designed to penetrate materials, allowing the pin to serve its purpose in fastening or holding items together. The point is typically tapered to ensure ease of insertion and effectiveness in use.
I think it is called wrist pin
Handguns work by having some mechanism hit a sensitive primer to initiate a control deflagration and shoot a bullet. If a handgun doesn't have an external hammer that either strikes a firing pin or the primer directly, it will have an internal hammer--called a striker.
The one closest to you is the head pin, or 1 pin. The rest of the pins are numbered from left to right on each row: the second row has the 2 and 3, third has 4, 5 and 6, and the fourth row has 7, 8, 9 and 10.
A thumbtack
there is a part of the circle that is straight. the pin closest to that straight part is negative