The 3/8" 125# Chrome Plated Leaded Red Brass Hex Locknut by Merit Brass is designed for high-performance applications requiring secure fastening. Constructed from leaded red brass, it ensures excellent strength and corrosion resistance. This locknut complies with ASTM B456 standards, making it suitable for high-pressure environments. With a 125# rating, it is ideal for plumbing and HVAC systems. The chrome plating not only enhances its aesthetic appeal but also increases durability. Its precise dimensions ensure a perfect fit with standard NPSL threads, making it a reliable choice for various projects.