Eaton Crouse-Hinds 3" Sealing Locknut, Rigid/IMC, Malleable Iron

Eaton Crouse-Hinds 3" SL Series Sealing Locknut

Professional-Grade Malleable Iron Construction for Superior Conduit Sealing

The Eaton Crouse-Hinds 3" SL Series Sealing Locknut is a premium malleable iron fitting engineered for secure conduit termination and sealing in rigid and IMC conduit systems. This professional-grade sealing locknut delivers superior mechanical strength and reliable environmental protection for commercial and industrial electrical installations.

Key Features & Benefits

Superior Material Construction

• Malleable Iron Construction - Provides exceptional strength and durability, significantly stronger than standard steel alternatives
• Corrosion Resistant Finish - Engineered coating protects against environmental degradation and extends service life
• Precision Threading - Machined threads ensure smooth installation and secure connection to conduit systems
• Professional-Grade Quality - Manufactured to Eaton's rigorous standards for decades of reliable performance

Advanced Sealing Performance

• Integrated Sealing Design - Creates weatherproof barrier when properly installed with appropriate sealing compound
• NEMA 3 Rating - Provides protection against falling dirt, rain, sleet, and snow for outdoor applications
• Environmental Protection - Prevents moisture infiltration and contamination in critical electrical systems
• Gasket Compatibility - Designed to work with standard sealing gaskets and compounds for enhanced protection

Installation Efficiency

• Standard Wrench Flats - Conventional hex design allows use of standard electrical tools for quick installation
• Smooth Threading Action - Precision-machined threads reduce installation time and effort
• Positive Engagement - Clear tactile feedback ensures proper seating and connection integrity
• Contractor-Friendly Design - Engineered for efficient installation in tight spaces and challenging conditions

Technical Specifications

This 3-inch trade size sealing locknut is specifically designed for rigid and IMC conduit applications, featuring malleable iron construction for superior mechanical properties. The fitting measures 3.96 inches in length, 2.52 inches in width, and 1.37 inches in height, with a total weight of 0.38 pounds. Manufactured to NEC/CEC compliance standards, this locknut provides NEMA 3 environmental protection and is suitable for ordinary/non-hazardous locations. The precision-engineered design ensures compatibility with standard 3-inch rigid and IMC conduit systems.

Installation Process

1. Verify conduit end is properly reamed and deburred to prevent damage to sealing surfaces
2. Apply appropriate thread sealant or sealing compound to conduit threads as required by application
3. Thread the sealing locknut onto the conduit end, ensuring smooth engagement of threads
4. Position the locknut to the desired location, typically flush with the enclosure wall or mounting surface
5. Tighten the locknut using appropriate wrenches, ensuring even pressure distribution around the sealing surface
6. Verify proper sealing by checking for gaps or misalignment that could compromise environmental protection

Applications

Perfect for:

• Commercial Buildings - Office complexes, retail centers, hospitals, and educational facilities requiring reliable conduit sealing
• Industrial Facilities - Manufacturing plants, processing facilities, and warehouses with demanding environmental conditions
• Outdoor Installations - Weather-exposed electrical systems requiring NEMA 3 protection against moisture and debris
• Municipal Infrastructure - Government buildings, public utilities, and transportation facilities with long-term reliability requirements
• Heavy-Duty Electrical Panels - Main distribution panels, sub-panels, and switchgear requiring secure conduit termination
• Equipment Connections - Motor control centers, disconnect switches, and electrical equipment requiring environmental sealing
• Agricultural Systems - Farm buildings, grain handling facilities, and livestock operations with moisture and dust exposure
• Parking Structures - Covered parking areas and garages requiring protection from weather infiltration

Sealing Locknut System Benefits

Sealing locknuts provide critical environmental protection that standard locknuts cannot match, making them essential for outdoor and wet location applications. Unlike basic mechanical connections, sealing locknuts create a weatherproof barrier that prevents moisture infiltration, corrosion, and system failures. The integrated sealing design eliminates the need for additional weatherproofing components while ensuring long-term reliability in challenging environmental conditions.

Why Choose Malleable Iron Construction?

Malleable iron offers superior mechanical properties compared to standard steel or aluminum alternatives, providing exceptional impact resistance and dimensional stability under thermal cycling. This advanced material maintains its structural integrity in demanding applications while resisting cracking and deformation that can compromise sealing performance. Trusted by electrical professionals for over 100 years, Eaton Crouse-Hinds malleable iron fittings deliver the reliability and longevity required for critical electrical infrastructure investments.