Find Aftermarket Truck Frame Nut Covers for the Mack RD Model. Upgrade your Mack RD's look with stylish and protective frame nut covers. Choose from cool designs like chrome top hats, skulls, and spikes to match your style. Sizes range from 5/8 inch to 1 1/8 inch, ensuring a perfect fit for your truck's nuts and bolts. These covers not only add flair but also protect your hardware from wear and tear, keeping your rig polished and road-ready. Dress up your Mack RD and keep it looking sharp with these must-have nut covers!