Locknut

Locknuts, also known as conduit locknuts or electrical locknuts, are essential fastening components used in electrical installations to secure conduit fittings, connectors, and cable glands to enclosures, junction boxes, or panel boards. These threaded ring-shaped devices are typically made from steel, brass, or stainless steel, with options for zinc-plated or nickel-plated finishes to resist corrosion. Locknuts feature internal threads that match standard conduit sizes (e.g., 1/2", 3/4", 1", etc.) and often include a serrated or knurled edge to provide a locking action against vibration. In industrial automation, they are critical for ensuring mechanical stability and grounding continuity in electrical systems, complying with standards like UL 514B or IEC 60670. Available in metric and imperial thread variants, locknuts are used with rigid metal conduit (RMC), intermediate metal conduit (IMC), electrical metallic tubing (EMT), and liquid-tight flexible conduit.

Locknuts are widely applied in electrical distribution panels, motor control centers, switchgear enclosures, and automation cabinets to secure conduit entries. They are also used in HVAC systems, lighting installations, and process control panels where reliable cable management is required. In hazardous locations, stainless steel locknuts provide corrosion resistance in chemical plants or offshore platforms. Their primary function is to prevent conduit or connector loosening due to mechanical stress or thermal cycling, ensuring long-term electrical safety.

Key subcategories include standard steel locknuts, brass locknuts for marine environments, and nylon locknuts for non-metallic conduit systems. Common article codes follow patterns like LN-1/2 (for 1/2" conduit), LN-3/4, or LN-1, with suffixes indicating material (e.g., -SS for stainless steel, -B for brass). For metric systems, codes such as M20-LN or M25-LN are used. These components are often sold in bulk packs or individually with clear thread specifications.

At Electric Automation Network, we offer a comprehensive range of locknuts with real-time pricing and stock availability. Our engineering team provides technical support to select the correct thread size, material, and finish for your application. With express shipping worldwide, we ensure fast delivery for critical projects. Each product includes detailed technical documentation, including dimensional drawings and torque specifications.