2-1/2" Steel Grounding Locknuts – Electrical Grounding Solutions

Topaz 2-1/2" Steel Grounding Locknuts are engineered for use with threaded conduit to provide secure locking and grounding connections. Designed for electrical distributors, lighting solutions providers, wire and cable specialists, and switchgear suppliers, these locknuts ensure reliable conduit-to-box connections in electrical installations. Constructed from heavy gauge steel with a zinc-plated finish, they maintain integrity under mechanical stress and environmental exposure. The serrated teeth design enhances grip, preventing loosening and ensuring grounding continuity. These locknuts are UL listed and comply with key industry standards, making them suitable for professional electrical applications.

Specifications

• Size: 2-1/2"
• Material of Construction: Steel
• Height: 0.185 IN
• Manufacturer Part #: 557
• Product Weight: 0.1180 lbs
• UL Listed: Yes (UL Standard 514B)
• Thread Pitch Diameter: 2.777 - 2.788 inches

Features

• Heavy gauge steel construction for durability
• Serrated teeth design for enhanced locking and grounding
• Prevents loosening of conduit connections
• Zinc plated finish for corrosion resistance
• UL listed for safety and compliance

Downloads & Links

• Spec Sheet