B&K 1/4 In. Malleable Black Iron Cap is a reliable and durable plumbing fitting designed for a variety of applications. Made from black malleable iron, this cap provides exceptional strength, longevity, and corrosion resistance, making it suitable for both residential and commercial plumbing systems. It ensures a secure and tight closure to prevent leaks and maintain the proper functioning of your plumbing setup. The malleable black iron construction enhances the cap’s durability, allowing it to perform well in different environments, including those with high pressure and high temperature. Whether used in water supply systems, gas pipelines, or other plumbing installations, this cap delivers dependable performance and long-lasting reliability. Model Number: 521-401HN