Topaz Lighting Aluminum Watertight Hub with Bonding Screw, Rigid/IMC, Insulated Throat

Topaz Lighting Aluminum Watertight Hub with Bonding Screw, Rigid/IMC, Insulated Throat

Topaz Lighting's Aluminum Watertight Hubs with Bonding Screw are engineered to securely connect Rigid or IMC conduit to standard knockouts in boxes and electrical enclosures. Constructed from corrosion-resistant aluminum, these hubs prevent moisture, dust, and other damaging particles from entering the conduit system. Available in 1/2" through 4" trade sizes, they feature an insulated throat for superior conductor protection and an oversized locknut with bonding screw for positive grounding and vibration resistance. UL Listed and approved for NEMA 2, 3R, 4, 4X, 5, 12, and 13 environments, including flame-retardant applications.

Key Features

• Trade Size Range: Available in 1/2" through 4" sizes to suit a wide variety of conduit and enclosure applications.
• Durable Construction: Corrosion-resistant aluminum body prevents moisture, dust, and damaging particles from entering the conduit system, ensuring long-term reliability.
• Conduit Compatibility: Designed for use with Rigid (RMC) and IMC conduit, connecting securely to standard knockouts in boxes and electrical enclosures.
• Insulated Throat: Built-in insulated throat provides superior protection for conductors, reducing the risk of insulation damage and minimizing costly rework.
• Oversized Locknut with Bonding Screw: Assures positive grounding continuity and protects against loosening or damage caused by vibration in demanding installations.
• Watertight Seal: Engineered to keep moisture and contaminants out, maintaining the integrity of the conduit system in wet and harsh environments.
• Flame Retardant Approved: Meets flame-retardant requirements as part of its NEMA multi-rating approval, supporting code-compliant installations.

Certifications & Compliance

• UL Listed
• NEMA 2 Rated
• NEMA 3R Raintight Rated
• NEMA 4 Watertight Rated
• NEMA 4X Corrosion-Resistant Watertight Rated
• NEMA 5 Rated
• NEMA 12 Rated
• NEMA 13 Rated
• Flame Retardant Approved

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Connecting Rigid (RMC) or IMC conduit to junction boxes, pull boxes, and electrical enclosures
• Industrial and commercial electrical installations requiring watertight conduit entry points
• Outdoor and wet-location conduit systems where moisture ingress must be prevented
• Installations subject to vibration where positive grounding and secure connections are critical
• NEMA 4 and 4X rated enclosure penetrations in corrosive or washdown environments
• New construction and retrofit projects requiring code-compliant, UL Listed conduit fittings

Why Topaz Lighting?

Topaz Lighting's Watertight Hubs are built from corrosion-resistant aluminum with an insulated throat and oversized bonding-screw locknut, delivering the material quality and grounding reliability that professional electricians demand. With UL Listing and approval across NEMA 2, 3R, 4, 4X, 5, 12, and 13 ratings, these hubs meet the most stringent code requirements for wet, dusty, and corrosive environments. Stocked in 1/2" through 4" sizes, Topaz Lighting ensures the right fitting is always available for any job.