Pan head shear bolt

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

Pan head shear bolts are specialized fasteners designed to break away at a predetermined torque, protecting machinery from overload damage. Here’s a detailed description:

Key Features:

Head Style:
- Pan Head – A slightly rounded, low-profile head with a flat bearing surface for even load distribution.
- Designed to sit flush or slightly above the surface when installed.
- Pan head shear bolt
Shear Mechanism:
- The hex or drive head shears off once the bolt reaches its specified torque limit, leaving a smooth shank to prevent disassembly.
- Used in tamper-proof and safety-critical applications.
Materials:
- Typically made from hardened steel, stainless steel, or corrosion-resistant alloys for durability.
- May include coatings like zinc plating or galvanization for extra protection.
Thread Type:
- Usually fully threaded or partially threaded (depending on application).
- Common thread standards: Metric (M) or SAE (UNC/UNF).
Drive Types:
- Hex drive (Allen key) – Most common for shear bolts.
- Torx or Phillips – Less common but used in specific applications.
- Pan head shear bolt
- The drive shears off after installation, leaving no way to remove the bolt without drilling.
Applications:
- Security fastening (e.g., traffic signs, public fixtures).
- Overload protection (e.g., conveyor systems, gearboxes).
- Aerospace & automotive (where tamper resistance is critical).