A countersunk bolt is designed with the flat head tapered along the body of the bolt, allowing it to be totally flush or underneath the surface of the material into which it will be fastened. Such a streamlined design not only yields a smooth appearance but also allows for minimizing the possibility of snagging or outer damage. Often, these bolts are applied in places where aesthetics... https://www.dalloyedbolts.com/countersunk-bolts-manufacturers-suppliers-stockists-exporters.html