The process begins with a huge coil of wire, up to 10 km long and weighing nearly two tons. This wire undergoes a chemical bath and acid treatment to remove impurities, followed by a zinc phosphate bath for protection and lubrication. An additional layer of drawing soap is applied to prevent friction and overheating during subsequent stages.

A specialized machine reduces the wire's thickness by pulling it through multiple narrow funnels. This process, similar to stretching chewing gum, makes the wire much thinner. Depending on the product, the wire may then go through a tempering furnace at extremely high temperatures for eight hours, followed by six hours of cooling, to increase its flexibility and prevent cracking.

The head of the screw is formed using a cold forming press. The wire is first cut to length, then subjected to a series of powerful blows. The first blow gives a rough shape, the third forms the head, and the fourth shapes the edges into a hexagonal form. This process involves precise impact to create the desired head geometry.

At the threading press, screws pass through a vibratory bowl that aligns them. Two scraping pieces then apply immense pressure to form the threads. This process generates significant heat and requires a lot of oil. The video also shows the key component with grooves that impress the thread and a raised spot to cut the screw's tip.

Nuts are also produced at the factory. A machine cuts the wire to the exact height of the nut. Then, impacts against a mold gradually form the hexagonal shape. A punch repeatedly strikes the center to create the hole. Finally, the nut is squeezed against a spinning tap, which has a reverse-threaded section, to form the internal thread.

Both screws and nuts undergo several finishing steps to enhance durability. They are washed with high-pressure water, dried in a centrifuge, and heated in a 900°C furnace with a carbon-rich atmosphere for 50 minutes to harden the metal. An oil bath rapidly cools them, followed by another bath to remove the oil and an acid bath to eliminate rust. Finally, galvanization dips the screws in a zinc solution, which adheres via electric current, creating a corrosion-protective layer.

The screws are packaged using a weighing dispenser that drops them into containers until the correct weight is reached. Meanwhile, another machine assembles boxes. The screws and boxes meet, undergo a final weight check, and then the box is sealed. For larger screws, a magnetic block system aligns them perfectly before packaging.

The factory produces an incredible variety of fasteners, with eight different head types, various thread types, and lengths. Including nails and rivets, the factory produces over 6,500 different items. Monthly production exceeds 400 million pieces, enough to circle the globe twice if lined up.