Tamper-resistant bolts and nuts

The fastening and opening of bolts and nuts adopts non-standard design, and the matching
non-standard tools are used to solve the opening and fastening problems. In general, other
wrenches cannot be inserted. In the appearance design of nuts and bolts, non-standard slotting
opening or pentagonal, heptagonal, nine-corner or custom-made corresponding groove tools
have played a very good anti-theft effect

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. lt is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

Tamper-resistant bolts and nuts are specialized fasteners designed to prevent unauthorized removal or tampering. They are commonly used in applications where security, safety, or vandalism prevention is critical. These fasteners feature unique designs or mechanisms that make them difficult to remove without the proper tools or knowledge.

Key Characteristics:

1. Unique Drive Designs:
   • Tamper-resistant bolts and nuts typically feature non-standard drive designs that require a special tool or key to install or remove. These drive patterns are not common in standard tools, which makes it difficult for unauthorized individuals to manipulate them.
   • Examples of drive designs include:
     • Pin-in-Hole: A central pin inside the bolt head that requires a corresponding driver.
     • Hex with Pin: A hexagonal shape with a central pin, preventing standard hex drivers from working.
     • One-way or Reverse Thread: These bolts can only be tightened, not loosened, without a special tool.
     • Spanner or Snake-Eyes: Two small holes opposite each other in the bolt head or nut, requiring a specialized tool.
2. Corrosion-Resistant Materials:
   • Many tamper-resistant bolts and nuts are made from high-strength, corrosion-resistant materials like stainless steel or coated with anti-corrosion finishes, ensuring durability even in harsh environments.
3. Security Features:
   • Often designed to resist tampering with tools like wrenches, pliers, or screwdrivers. Some designs include additional features like locking mechanisms or captive nuts, which help to further secure the fastener.

Tamper-resistant bolts and nuts are essential in environments where standard fasteners could be easily removed or compromised, providing an added layer of protection and peace of mind.