Torque-Limiting Coupling System for Use in Breakaway Mounting Systems for Roadway Signposts and Methods of Use

A method of controlling torque applied to a fastener in a mounting system, comprising:

• a. positioning a sacrificial torque-transfer element between a driven component having a first engagement feature and a driver component having a corresponding engagement feature such that the sacrificial torque-transfer element is received within and engaged with the first engagement feature of the driven component and the corresponding engagement feature of the driver component;
• b. applying torque to the driver component to transmit torque to the driven component through the sacrificial torque-transfer element;
• and
• c. failing the sacrificial torque-transfer element upon the applied torque exceeding a predetermined threshold, thereby limiting further torque transmission to the driven component.

A torque-limiting driven component for use in a mounting system, comprising:

• a. a body having a threaded center configured to receive a threaded fastener;
• b. a first engagement feature formed in the body;
• and
• c. a sacrificial torque-transfer element configured to be received within and
• engaged with the first engagement feature and a corresponding engagement feature of a driver component;
• d. wherein the sacrificial torque-transfer element is configured to transmit torque to the driven component and to fail upon application of torque exceeding a predetermined threshold to limit torque applied to the driven component.