Appleton GL300 Malleable Ground Locknut 3 Inch

Product Description

The APPLETON GL300 is a 3-inch malleable iron ground locknut designed to secure conduit fittings and establish a reliable grounding path in electrical installations. Malleable iron construction provides the durability and thread engagement needed for rigid and IMC conduit systems in demanding environments. This locknut is installed by licensed electricians during conduit system assembly, ensuring both mechanical retention and electrical continuity at the enclosure or junction box connection point.

The GL300 is suited for use in commercial, industrial, and residential electrical installations where a 3-inch grounding locknut is required. It is typically installed at the point where conduit enters an enclosure, panel, or junction box, providing a grounded mechanical connection. This fitting is commonly used in new construction and retrofit work where conduit grounding integrity is a code requirement.

Key Features

• 3-inch trade size for use with standard rigid and IMC conduit systems
• Malleable iron construction for strength and resistance to mechanical stress
• Grounding locknut design provides electrical continuity at enclosure entry points
• Threaded engagement secures conduit fittings against loosening from vibration

Compatibility

Designed as an OEM-style replacement and standard-use grounding locknut for 3-inch rigid metal conduit and intermediate metal conduit installations.

Installation Notes

Installation is performed by a licensed electrician in accordance with NEC requirements for conduit grounding and bonding. De-energize all circuits and verify zero voltage before working inside any enclosure or panel. Thread the locknut onto the conduit fitting and tighten firmly against the enclosure wall using a strap wrench or locknut wrench to ensure solid metal-to-metal contact for grounding continuity. Do not substitute this fitting in applications requiring a listed insulating or bonding bushing where code mandates one.

Technical Specifications

• Trade Size: 3 inches
• Material: Malleable iron
• Weight (per 100 units): 37 pounds
• UPC: 78138143635

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: GL300