Why are some titanium machine screws flat at the end?

Sometimes when we look at the end of the titanium machine screws, we can see that some of the screw end is flat, and some of the screw end is not flat. Why is this?

One is the production of titanium machine screws model is not the same. Some screw structure is relatively simple, the use of a single mold machine can be produced. We all know that no matter what type of machine, there are scissors for cutting at the beginning. Single – die machine scissors cut out of the material tail is not flat. Because the single – die machine scissors are responsible for cutting the place is not flat.

If the titanium machine screws are more complex, then you need to use a multi-station machine for production. The cutting area of the scissors for the multi-station machine is flat. So the end of the screw produced is flat.

Two, titanium machine screws are made by a single die machine, but the scissors are customized, and the end of the material is cut flat when cutting. Or after the production of semi-finished products, take the end of the screw to process, so that the tail becomes flat.