The SSRS4-2-01 is a stackable, self-retaining spacer used for creating space between components. It is specifically designed for a #4 screw and locks into a 0.062-inch thick panel via a 0.187-inch mounting hole. This spacer has a length of 1/8 inch (3.2 mm) and is constructed from natural-colored Nylon 66. Its design allows for stacking, making it versatile for various spacing applications in electronic and mechanical assemblies.