The SSRS4-8-01 is a stackable, self-retaining spacer used for maintaining consistent spacing between components. Constructed from natural-colored Nylon 66, this spacer is designed for a #4 (M-3) screw. It features a length of 1/2 inch (12.7 mm) and is engineered to lock securely into a 0.062-inch (1.57 mm) thick panel, requiring a mounting hole of 0.187 inches (4.75 mm). Its self-retaining and stackable design makes it ideal for applications in printed circuit board mounting and chassis assembly where reliable and precise component separation is critical.