Southwire L423 Snap-in Blank Steel Squeeze Connector

Product Description

The SOUTHWIRE L423 is a snap-in blank steel squeeze connector designed for use in electrical enclosures and junction boxes. This fitting installs into a knockout opening and snaps securely into place, sealing unused knockouts against dust, debris, and accidental contact. Constructed from steel, it provides a durable, code-appropriate closure where conduit or cable entry is not needed. Licensed electricians and electrical contractors install this type of fitting during rough-in and finish work on both residential and light commercial projects.

The L423 is suited for use in standard electrical panels, junction boxes, outlet boxes, and similar metallic enclosures where open knockouts must be closed per NEC requirements. Its snap-in design speeds installation without tools, making it a practical choice for service work and new construction alike. This part is also cross-referenced as Madison Electric L-42-3 and Topaz 153L and 153.

Key Features

• Steel construction for durable, code-compliant knockout closure
• Snap-in design installs without additional fasteners or tools
• Seals unused knockouts against dust and debris
• Compatible cross-reference for Madison Electric L-42-3, Topaz 153L, and Topaz 153
• One-year limited warranty

Compatibility

Cross-referenced as Madison Electric L-42-3, Topaz 153L, and Topaz 153. Designed as an OEM-style replacement snap-in blank for standard steel electrical enclosures and junction boxes requiring knockout closure.

Installation Notes

Installation is performed by a licensed electrician. De-energize and lock out the enclosure before servicing any panel or junction box. Align the blank over the knockout opening and press firmly until the snap-in tabs seat fully. Verify the blank is flush and secure before restoring power, in accordance with applicable NEC requirements.

Technical Specifications

• Material: Steel
• Length: 18.9 inches
• Width: 6.4 inches
• Height: 4 inches
• Weight: 6 pounds
• Warranty: One Year Limited
• Country of Origin: China

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: L423