Arlington Industries 4201A Twin-Screw All-Purpose Insulated Connector, 1/2"

Arlington Industries 4201A Twin-Screw All-Purpose Insulated Connector, 1/2"

The Arlington Industries 4201A Twin-Screw All-Purpose Insulated Connector is a 1/2" fitting built to give electrical contractors a fast, secure way to terminate flexible conduit and cable runs. Its twin-screw (two-screw) design bites firmly into the conduit or cable armor, creating a mechanically sound connection at the box or enclosure, while the insulated throat is engineered to protect conductor insulation from nicks and abrasion as wires are pulled and seated. As an all-purpose connector, the 4201A is intended to give installers a single, versatile 1/2" fitting that works across a range of flexible wiring methods instead of requiring a different connector for every application. The result is a straightforward, job-site-ready connector that helps keep rough-in and finish electrical work moving on schedule.

Key Features

• Trade Size: Sized at 1/2" to match common flexible conduit and cable trade sizes, simplifying connector selection for standard box and enclosure knockouts.
• Twin-Screw Connection: Two independent set screws bite into the conduit or cable armor from opposite sides, distributing clamping force evenly for a secure mechanical grip.
• Insulated Throat: The insulated interior surface is designed to shield conductor insulation from sharp edges and abrasion as cable is fed through the connector body.
• All-Purpose Design: Engineered as an all-purpose connector so installers can rely on one 1/2" fitting for multiple flexible conduit and cable applications on the same job.
• Fast Field Installation: The twin-screw tightening method is designed for quick hand- or driver-tightened terminations, reducing installation time at the box.
• Compact Connector Body: A low-profile 1/2" connector body is sized to fit standard box knockouts without crowding adjacent conductors or fittings.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Flexible Metal Conduit (FMC) Terminations
• MC Cable Connections at Panels and Boxes
• Junction Box and Enclosure Wiring
• Commercial Electrical Rough-In
• Residential Electrical Rough-In and Remodel Work
• New Construction and Renovation Projects

Why Arlington Industries?

Arlington Industries engineers connectors like the 4201A to help electrical professionals complete secure, dependable 1/2" flexible conduit and cable terminations without juggling multiple specialty fittings. The twin-screw, insulated-throat construction is built to protect conductors while providing a firm mechanical connection at the box, supporting reliable, code-conscious installations on both commercial and residential projects. For contractors who need a versatile, all-purpose 1/2" connector they can count on job after job, the Arlington 4201A is designed to deliver consistent, professional-grade performance.