The primary components of a fuel tank are:

Tank body: The tank body is the main structural component of the fuel tank and is typically made of metal, such as steel or aluminum. It is designed to hold the fuel and withstand the pressure of the fuel inside the tank.

Fuel filler neck: The fuel filler neck is a tube that extends from the top of the fuel tank to the fuel filler opening. It is used to pour fuel into the tank and is typically sealed with a fuel filler cap.

Fuel sender: The fuel sender is a device that is used to measure the level of fuel in the tank and send this information to the fuel gauge on the dashboard. It consists of a float, a resistor, and a wiring harness.

Fuel pickup: The fuel pickup is a tube that extends from the fuel pump to the bottom of the fuel tank. It is used to draw fuel from the tank and is typically located near the bottom of the tank to ensure that the fuel pump is always submerged in fuel.

Fuel return line: The fuel return line is a tube that is used to return excess fuel from the engine back to the fuel tank. It helps to regulate the flow of fuel to the engine and prevents fuel from being wasted.

Fuel vent: The fuel vent is a tube or valve that is used to allow air to enter and exit the fuel tank as fuel is used. It helps to maintain proper fuel pressure inside the tank and prevents the tank from collapsing or imploding.