Southwire L422 Snap-in Blank Steel 3/4 in Connector

Product Description

The SOUTHWIRE L422 is a snap-in blank steel squeeze connector designed to seal unused knockouts in electrical enclosures, panels, and junction boxes. The snap-in design allows for quick, tool-free installation, pressing firmly into a standard knockout opening to block conduit entry points that are not in use. Constructed from steel, this connector provides a durable, code-compliant closure that protects wiring and internal components from debris, pests, and accidental contact. It is a standard item for electricians working on residential and commercial panel installations and rough-in work.

This connector is suited for use in electrical panels, distribution boards, metal enclosures, and junction boxes where unused 3/4 inch knockouts require a secure blank closure. Electricians commonly stock snap-in blanks when performing service upgrades, panel replacements, or new construction rough-in where not all knockout positions are populated with conduit fittings. The L422 is also referenced by Madison as L-42-2 and by Topaz as 152, making it a commonly cross-referenced item across electrical supply catalogs.

Key Features

• Snap-in design allows tool-free installation into standard knockout openings
• Steel construction for durability and a secure fit in metal enclosures
• Seals unused 3/4 inch knockouts to maintain enclosure integrity
• Cross-referenced with Madison L-42-2 and Topaz 152 for easy substitution
• One year limited warranty

Compatibility

Designed as an OEM-style replacement and standard fit for residential and commercial electrical enclosures, panels, and junction boxes with standard 3/4 inch knockout openings. Also cross-referenced as Madison L-42-2 and Topaz 152.

Installation Notes

Installation is performed by licensed electricians in accordance with the National Electrical Code (NEC). De-energize and lock out the panel or enclosure before inserting or removing any knockout blanks. Align the blank over the unused knockout opening and press firmly until the snap-in tabs seat securely against the enclosure wall. Verify the blank is flush and fully seated before restoring power.