Thomas Betts 141SL Conduit Locknut 1/2 Inch Rigid Imc Steel

Product Description

The THOMAS BETTS 141SL is a steel conduit locknut designed to secure conduit fittings to electrical enclosures, junction boxes, and panels. It uses a threaded connection to lock rigid metal conduit and intermediate metal conduit (IMC) terminations firmly in place, preventing loosening from vibration or mechanical stress. The 141SL is non-insulated and rated for watertight area-of-application use, making it suitable for installations where moisture resistance at the connection point is a factor. Electricians reach for locknuts like this during conduit termination work on commercial and industrial jobs as well as residential service installations.

This locknut is sized for 1/2 inch trade size conduit, the most common size in branch-circuit and low-voltage conduit runs. It is appropriate for use with rigid metal conduit (RMC) and intermediate metal conduit (IMC) systems in both indoor and outdoor environments where a threaded steel locknut is called for. The watertight area-of-application designation makes it a fit for wet or damp location enclosure entries when used with compatible watertight fittings.

Key Features

• 1/2 inch trade size fits the most common conduit diameter in electrical work
• Steel construction provides mechanical strength and durability at enclosure entries
• Threaded connection type for secure, twist-on installation without additional tools
• Non-insulated design for standard metal-to-metal bonding continuity
• Rated for watertight area-of-application use alongside compatible watertight conduit fittings
• Compatible with both rigid metal conduit (RMC) and intermediate metal conduit (IMC)

Compatibility

Designed for use with 1/2 inch trade size rigid metal conduit (RMC) and intermediate metal conduit (IMC) threaded fittings and enclosure knockouts.

Installation Notes

Installation is performed by licensed electricians in accordance with applicable NEC requirements for conduit terminations and enclosure entries. Power down the circuit and de-energize the enclosure before beginning conduit termination work. Thread the locknut onto the conduit fitting and tighten firmly against the enclosure wall using a locknut wrench or screwdriver seated in the lug slots to ensure a solid mechanical and bonding connection. Do not overtighten in a way that distorts the enclosure knockout or fitting threads.