Caplugs offers the industry's largest product line of thread and fitting protection. Choose from more than 12,000 catalog parts in stock and ready to ship today. Our line of component protection includes caps, plugs and hose guard in a wide range of sizes, styles and materials. We've designed parts to meet the industry's most commonly used fittings such as JIC, NPT, Flared, Flareless, Metric and more. All catalog, Surface Finishing ...