This cable strain relief device protects the life of your electronic and electrical products by absorbing forces from pull, push, and twist on flexible power cords. It securely mounts, insulates, and safeguards cables at panel entry points. Available in sizes for 0.040-inch (1.0 mm) thick panels, such as SR 4A-6 and SR 3A-4, with detailed charts provided. Corresponding mounting hole plugs can be used to fill unused holes, enabling a single panel design for multiple applications. For additional wire types and sizes, consult Heyco. Compatible assembly tools and double D mounting hole punches are also available.