Southland Galvanized Locknut is crafted from galvanized malleable iron, ensuring durability and resistance to corrosion. Each fitting is individually flag tagged for easy identification, and the Mueller logo is cast into the body of each piece, signifying quality and ity. These locknuts are inspected and quality tested to meet stringent standards. They comply with ANSI/ASTM A-197 material specifications and conform to ANSI/ASME dimensional standards B.15.3, B16.14, and B16.39, with threading that meets ANSI B1.20.1 requirements. Available in various sizes ranging from 3/8" to 1-1/2", each locknut is finished with a galvanized coating and packaged individually, typically in bags, making them convenient for storage and use in different applications. Model Number: 510-902HC