Security Hardware - 5/16-18 Zinc Alloy Break-Away Security Nut - Break-Away nuts are designed to prevent unauthorized removal and to secure access to equipment and facilities. No special tool is required, Break-Away nuts are installed using a standard wrench. They are used extensively in correctional institutions, hospitals, schools, public places and retail stores to secure a variety of products. Break-Away nuts are suitable for applications where removal of a fixture is not intended and when prevention of tampering is important. After tightening to the proper torque, the hex head breaks away leaving a conical shaped tamper resistant nut. These Break-Away nuts are manufactured from ZAMAK 5 zinc alloy. The nuts are tapped to the standard bolt dimension of 5/16-18.