The 3.500" Line Cap Insert from Dresser Industries is engineered for effective sealing in piping systems. This insert is designed to fit securely within standard line caps, providing a reliable barrier against leaks and contaminants. Constructed from high-quality materials, it offers durability and resistance to various environmental conditions. Its dimensions are tailored for compatibility with industry-standard fittings, ensuring ease of installation. Ideal for use in oil and gas, water treatment, and chemical processing applications, this line cap insert enhances system integrity.