Coded safety bolt for e.g. commercial shackle used for fastening anchor cable for securing boat, has coded tool receiver that is provided in free end of coded safety bolt

摘要

The coded safety bolt has special types of abutment unit and attachment element. A coded tool receiver is provided in a free end of the coded safety bolt. The angle (f) between a tangent line (g) to an outer diameter (c) of upper bolt head and support surface of bolt (a) is set to less than 45 degrees. The length of cylindrical or chamfered region (b) on outer diameter of the bolt head is set to less than 2 mm above the contact surface of shackle.