A glass-reinforced nylon component which pins the Holder (on the accessory) to the Body, on the vehicle, securing them together on a roof rack when the roof rack accessory is mounted. The pin also secures the Cover when the accessory is removed to provide a neat flush face to the body. This ensures the accessory fixed to an HD or XD Hitch system will not rattle or move during transport or movements. Suits all HD Standard Hitch range Bodies (8159, 8160, 8161, 8162, 8163, 8179, 8180, 8181) and XD Hitch ranges (9000, 9001).