It's called a KEEPER.
I thought it was called a loop, but it is called a keeper.
The loop you tuck the end of a belt into is called a "keeper" or "belt keeper." Its purpose is to secure the excess length of the belt, keeping it tidy and preventing it from flapping around. Some belts come with a fixed keeper sewn into the belt, while others may have a removable or adjustable option. Properly using the keeper enhances both the functionality and appearance of the belt.
1342 1 is at timing belt end 1342 1 is at timing belt end 1342 1 is at timing belt end
seat belt lifebelt beltway belt buckle belt loop
Hickok Belt ended in 1977.
The belt and the buckle.
The main asteroid belt is actually called the asteroid belt - pretty dull really.
The loop that is attached to a belt is called a D ring. This loop was put on the belt as part of the design and to use the belt properly.
Belt Railway of Chattanooga ended in 1946.
Alameda Belt Line ended in 2007.
Omaha Belt Railway ended in 1910.