Stainless Steel Watertight Grounding Hub UL 514B & UL 467

Integrated Positive Grounding

Watertight grounding hubs are certified under UL 467 as Grounding and Bonding Equipment, providing a positive ground connection for external conductors. Key grounding features include:

• Grounding locknut with attached tab and screw for secure ground wire connection
• Sharper and deeper teeth on locknut and body designed for a more penetrating bite for improved bonding to the enclosure
• Reliable ground continuity – Maintains equipment grounding path through the hub
• NEC compliance – Meets Section 250.92 for service equipment and Section 250.97 for circuits rated over 250 volts

Superior Corrosion Resistance

Manufactured from Type 316 stainless steel with electropolished finish, our watertight grounding hubs provide exceptional performance in challenging environments:

• Superior corrosion resistance – Exceptional protection against chlorides, acids, and saline atmospheres
• Molybdenum-enhanced durability – Resists pitting and crevice corrosion in aggressive environments
• Sanitary properties – Suitable for food processing, pharmaceutical, and hygienic applications
• Long service life – Eliminates lifecycle costs associated with corrosion-related failures
• Hygienic polished finish – Delivers outstanding protection in food processing plants where rigorous chemical washdowns are essential

Electropolished Finish

The electropolished finish provides:

• Enhanced corrosion resistance – Smooth surface minimizes bacterial adhesion and crevice corrosion
• Easy cleaning – Sanitary design suitable for CIP (clean-in-place) systems
• Professional aesthetic – Glossy to high-gloss finish for visible installations
• Defined surface roughness – Achieves Ra values as low as 0.38 μm for superior cleanability

Watertight & Raintight Construction

Designed for use in wet locations, our watertight grounding hubs provide:

• Reliable watertight seal – Sealing ring and groove with innovative profile outperforms standard O-ring design
• Raintight sealing – Suitable for outdoor and washdown applications
• Type 4X rating – Corrosion-resistant and watertight protection
• Neoprene O-ring / Nitrile sealing ring – Assures weatherproof seal against enclosure wall

Insulated Throat

Furnished with a polypropylene insulated throat that:

• Protects wire insulation – Prevents conductor damage during installation and throughout service life
• Provides smooth entry – Facilitates wire pulling and prevents abrasion
• Maintains integrity – Provides long-term protection for conductors

Precision NPT Threading

• Machined tapered female NPT threads for secure connections to rigid conduit and IMC
• Watertight sealing – Machined tapered threads offer watertight sealing
• Leak-resistant joints with excellent ground continuity

Hexagonal/Splined Body and Locknut

• Hexagonal/splined body and locknut enable fast and easy installation
• Spline spaced every 30 degrees allows easy application of torque with a screwdriver
• Locknut design with peripheral slots for versatile installation

Furnished Components

Each watertight grounding hub is supplied complete with:

• 316SS grounding locknut – For positive bonding and secure mounting
• Ground tab and screw – For secure ground wire connection
• Neoprene O-ring or Nitrile sealing ring – Provides weatherproof sealing
• Polypropylene insulated throat – Protects conductors from abrasion

Permanent Identification

• Permanent fiber laser identification eliminates contamination risks and maintains traceability without surface marring

Hazardous Location Suitability

UL listed watertight grounding hubs are suitable for use in the following hazardous locations under NEC:

• Class I, Division 2 – Groups A, B, C, D
• Class II, Division 1 & 2 – Groups E, F, G
• Class III, Division 1 & 2