Thomas & Betts 145 1-1/2" Steel Conduit Locknut

Thomas & Betts 144 1-1/4" Steel Threaded Locknut for Conduit Connectors

The Thomas & Betts 144 is a 1-1/4" steel locknut engineered to secure conduit connectors, hubs, and fittings to electrical enclosures, boxes, and panels. Manufactured from durable steel, this threaded locknut runs down onto rigid or IMC conduit connectors to create a tight, code-compliant termination point at the knockout. Locknuts of this type are a staple of professional conduit installations, sandwiching the enclosure wall between the connector shoulder and the locknut teeth to lock the assembly firmly in place. Built for the demands of everyday commercial and industrial electrical work, the 144 delivers dependable, long-lasting holding power wherever 1-1/4" conduit terminates at a box, panel, or enclosure.

Key Features

• Trade Size: Sized for 1-1/4" conduit connectors and fittings, matching the connector diameter for a proper, secure fit.
• Durable Construction: Manufactured from steel for strength, rigidity, and long-term reliability in conduit assemblies.
• Threaded Design: Steel internal threads allow the locknut to be run down and tightened against a conduit connector, hub, or enclosure knockout, locking the fitting securely in place.
• Locknut Type: Purpose-built for use with conduit connectors and fittings in raceway systems, a standard companion component wherever conduit enters a box, panel, or enclosure.
• Enclosure Compatibility: Designed to seat against standard knockout openings sized for 1-1/4" conduit, helping maintain a stable, properly grounded conduit run.
• Simple Installation: Straightforward threaded design speeds installation with standard hand or lock-nut tools and helps maintain a secure, vibration-resistant connection over time.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Conduit and Raceway Systems
• Electrical Panelboard and Enclosure Connections
• Commercial and Industrial Electrical Installations
• Junction Box and Cabinet Wiring
• New Construction and Retrofit Wiring Projects

Why Thomas & Betts?

Thomas & Betts is a well-established name in electrical connection and conduit hardware, recognized for producing steel components built to perform reliably in demanding installation environments. The steel construction of the 144 locknut reflects that same commitment to durable, straightforward hardware that electricians and contractors can depend on to complete a secure, properly seated conduit termination on every job, from routine box connections to larger commercial and industrial raceway installations. Its steel locknut design remains a trusted, code-compliant choice for securing conduit connectors and fittings at enclosures, panels, and junction boxes throughout commercial and industrial wiring projects, giving electricians confidence in every 1-1/4" termination they complete.