How Fastener Factories Forge Bolt Heads Using Hot Heading - Video

How do industrial fasteners withstand tons of pressure without snapping? ???? It all comes down to a heavy manufacturing process called Hot Heading!
​In this video, you are watching a red-hot metal rod being inserted into an automatic upsetting/forging machine. The tip of the rod is heated to a precise plastic state. When the mechanical ram strikes, it exerts massive compressive force, causing the glowing metal to deform and completely fill the die cavity. This instantaneous process forms the strong, hexagonal head of a heavy-duty bolt.