The TOPAZ-283 Rigid Conduit Locknut is a durable electrical fitting designed to securely fasten rigid or IMC conduit to electrical boxes and enclosures. Manufactured from high-strength zinc-plated steel, it offers excellent corrosion resistance and long-lasting performance in demanding environments. Featuring serrated teeth, this locknut helps prevent loosening caused by vibration, ensuring a safe and stable connection. With a 1-inch trade size and 11-1/2 TPI threading, it provides a precise fit and easy installation. Ideal for commercial, industrial, and electrical applications, the TOPAZ-283 ensures reliable grounding, secure conduit connections, and enhanced system safety.