Durable quality The rubber motorcycle windshield nuts are made of marine rubber with brass threaded inserts. They are rust and wear resistant, sturdy and durable for longterm use. Reliable waterproof seal and vibration reduction They create a waterproof seal and minimize vibration. Shock and vibration isolation helps prevent noise and cracking. Rubber sock nuts are a common choice for waterproof holes where fixing is required. The original standard can directly the old or defective standard. Function and compatibility M4 or M5 or M6 rubber metric nuts form a watertight seal and minimize vibration. Vibration isolation helps prevent rattling and pulling. Easy to install Motorcycle Windshield Screw Kit. Simply insert the fastener into the hole, insert and tighten to enlarge and expand the sleeve. Use scenarios and applications Replacing worn or damaged windshield mounting hardware on a motorcycle to restore waterproofing and reduce rattling. Installing a windshield or fairing in rainprone or vibration environments to maintain a water seal and reduce noise. Upgrading existing windshield hardware with rubber metric nuts to improve vibration isolation and water resistance.