Round head shear bolts

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It 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

Round head shear bolts, also known as shear bolts or break-off bolts, are specialized fasteners designed to provide tamper-resistant security. They are commonly used in applications where vandalism, theft, or unauthorized access is a concern, such as in public infrastructure, machinery, electronics, and transportation systems.

Key Features of Round Head Shear Bolts:

1. Shear Mechanism

   • The bolt head is designed to snap off (shear) once a specific torque is reached during installation, leaving only a smooth, rounded surface behind.

   • This prevents removal with standard tools like wrenches or sockets.

2. Round (Dome) Head Design

   • After shearing, the remaining head is smooth and rounded, making it difficult to grip with pliers or other tools.

   • The dome shape also improves aesthetics and reduces snagging.

3. Tamper-Resistant

   • Removal typically requires specialized tools (e.g., left-handed drill bits, extraction sockets, or shear bolt removers).

   • Some versions have unique drive patterns (such as pin-in-hex or spanner heads) before shearing.

4. Materials & Coatings

   • Often made from hardened steel, stainless steel, or other durable metals.

   • May include corrosion-resistant coatings (zinc plating, black oxide, etc.) for outdoor or harsh environments.

5. Common Applications

   • Security panels (electrical boxes, meters, traffic signals)

   • Public infrastructure (street signs, benches, railings)

   • Automotive & aerospace (license plates, access panels)

   • Industrial machinery (safety guards, equipment housings)

Installation & Removal:

• Installation: Tightened with a standard tool (e.g., hex key) until the head breaks off.

• Removal: Requires drilling, prying, or specialized extractors, making unauthorized access difficult.