SEPCO S4066 Series Insulated Zinc-Plated Steel EMT Set-Screw Connector

SEPCO S4066 Series Insulated Zinc-Plated Steel EMT Set-Screw Connector

The SEPCO S4066 Series Insulated EMT Set-Screw Connector is a zinc-plated steel fitting engineered to terminate Electrical Metallic Tubing (EMT) conduit into boxes, panels, cabinets, and other enclosures. This connector family is available in trade sizes from 1/2" through 4" (1/2", 3/4", 1", 1-1/4", 2", 2-1/2", 3", and 4"), letting contractors standardize on one dependable fitting design across an entire EMT raceway run. Every size in the series shares the same set-screw connection method for a secure, mechanically sound termination, and the same insulated throat that helps protect conductor insulation from abrasion as wires are pulled through the fitting. Built in durable zinc-plated steel across the full size range, this connector series is intended for standard commercial and industrial EMT raceway installations where a dependable, long-lasting termination fitting is required.

Key Features

• Trade Size Range: Offered in sizes from 1/2" up to 4" (1/2", 3/4", 1", 1-1/4", 2", 2-1/2", 3", 4") to match a wide range of EMT conduit diameters on a single connector platform.
• Set-Screw Termination: The set-screw connection method secures the connector to EMT conduit across every trade size, creating a firm mechanical connection without soldering or specialty tools.
• Insulated Design: An integral insulated throat helps protect conductor insulation from abrasion during and after installation, reducing the risk of nicked or damaged wire jackets at the termination point.
• Durable Construction: A zinc-plated steel body resists corrosion and provides long-term mechanical strength, helping the connector hold up in demanding job-site conditions at any size in the series.
• EMT Compatible: Engineered specifically for terminating Electrical Metallic Tubing (EMT) conduit runs into boxes, panels, and enclosures.
• Consistent Fit: Sized to mate with standard EMT conduit across the full 1/2" through 4" size range for a secure, straight, properly aligned connection at the box or enclosure knockout.

Technical Specifications

• Connection Type: Set Screw
• Trade Size: 1/2" - 4"

Typical Applications

• Commercial and Industrial Electrical Installations
• EMT Conduit and Raceway Systems
• Panelboard and Enclosure Wiring Terminations
• Branch-Circuit Wiring in Office, Retail, and Institutional Buildings
• Renovation and New Construction Electrical Work

Why SEPCO?

SEPCO manufactures electrical fittings built for dependable, workmanlike performance on the job site. Across the full S4066 series, the zinc-plated steel construction delivers corrosion resistance and durability, while the insulated throat adds an extra layer of conductor protection at every termination point. With sizes spanning 1/2" through 4", contractors and electricians get a consistent, straightforward EMT termination solution they can install quickly and trust to hold up over time on commercial and industrial raceway projects alike.