Appleton GL-1000-D 4 Inch Grounding Locknut

Product Description

The APPLETON GL-1000-D is a 4-inch malleable iron grounding locknut used to secure conduit fittings to enclosures, junction boxes, and panels while maintaining a reliable ground path. The locknut bites into the enclosure wall during installation, creating metal-to-metal contact that satisfies grounding continuity requirements under the NEC. At 0.36 pounds, it is a compact, heavy-duty hardware component suited for use in commercial and industrial electrical installations. Licensed electricians and electrical contractors are the primary installers of this fitting.

This grounding locknut is used in rigid metal conduit and intermediate metal conduit installations where a positive ground bond between the conduit system and the enclosure is required. It is appropriate for use in commercial buildings, industrial facilities, and utility installations wherever threaded conduit enters a metal enclosure and a grounding locknut is specified by code or design. The 4-inch trade size fits standard 4-inch threaded conduit entries.

Key Features

• 4-inch trade size fits standard threaded rigid and intermediate metal conduit
• Malleable iron construction provides strength and resistance to impact during torquing
• Grounding-style design establishes metal-to-metal ground continuity at the enclosure
• Compact profile at 0.70 inches height keeps enclosure entry clean
• Lightweight at 0.36 pounds for easier handling in overhead or confined installations

Compatibility

Designed as an OEM-style grounding locknut for use with 4-inch threaded rigid metal conduit and intermediate metal conduit systems in standard electrical enclosure applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements for grounding and bonding of metal conduit systems. De-energize the panel or enclosure before beginning work. The locknut should be tightened firmly so the serrated edge bites into the enclosure metal to establish the required ground bond. Do not use this fitting on non-metallic conduit or non-metallic enclosures where a ground path cannot be completed.

Technical Specifications

• Trade Size: 4 inches
• Material: Malleable Iron
• Weight: 0.36 pounds
• Package Dimensions (L x W x H): 9.4 inches x 6.2 inches x 0.7 inches
• UPC: 68785517075

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: GL-1000-D