USA standard EMT connectors are specialized fittings designed to join electrical metallic tubing (EMT) with junction boxes, enclosures, or other conduit sections, adhering to strict specifications set by the National Electrical Code (NEC) and Underwriters Laboratories (UL). These connectors are typically made from malleable iron or galvanized steel, ensuring conductivity and durability in commercial and industrial electrical installations. The design features a threaded end that screws into the EMT, with a compression ring or set screw that tightens to create a secure, code-compliant connection. Sizes range from 1/2 inch to 4 inches in diameter, matching standard EMT conduit dimensions, and they often include a insulated throat to protect wire insulation from abrasion. Key standards include UL 514B for conduit fittings and NEC Article 358, which mandates proper grounding and bonding—facilitated by the connector’s metallic construction that maintains electrical continuity. Many models feature a zinc plating or organic coating to resist corrosion, suitable for both dry and damp locations. Easy to install with basic tools (wrenches, screwdrivers), these connectors ensure reliable, safe electrical pathways, making them a foundational component in North American electrical systems.