Abb WA121 Steel City Reducing Washer 3/4 to 1/2 Inch 500 Pack

Product Description

The ABB WA121 is a steel reducing washer designed to adapt a 3/4-inch knockout opening to accept a 1/2-inch conduit connector or fitting. Manufactured under the Steel City brand, this washer provides a clean, code-compliant solution for reworking panel knockouts, junction boxes, and enclosures without replacing the enclosure itself. The flat washer design seats flush against the box wall, filling the gap between the smaller fitting and the larger knockout. Sold in a pack of 500, it is well suited for contractors and electricians working on large commercial or multi-unit residential projects where reducing washers are needed in volume.

This reducing washer is used in electrical panel and enclosure work where a 3/4-inch knockout must be reduced to fit a 1/2-inch conduit connector. Typical applications include service panels, load centers, junction boxes, and pull boxes in residential, commercial, and light industrial settings. Electricians use these washers to maintain a tight, professional fit at conduit entry points while keeping metallic continuity across the enclosure wall.

Key Features

• Reduces a 3/4-inch knockout to a 1/2-inch conduit fitting opening
• Steel construction for durability and metallic enclosure continuity
• Flat washer profile seats flush against the box or panel wall
• Pack of 500 units supports high-volume commercial or production wiring work
• Compatible with standard conduit connectors and locknuts used in metallic enclosures

Compatibility

Designed as an OEM-style fit for use with standard 1/2-inch conduit connectors installed in 3/4-inch knockouts on metallic electrical enclosures, panels, and junction boxes.

Installation Notes

Installation is performed by licensed electricians in accordance with applicable NEC requirements for conduit entries into metallic enclosures. De-energize all circuits and verify power is off before opening any panel or enclosure. Seat the reducing washer over the knockout opening before threading the conduit connector locknut to secure the fitting. Do not force or deform the washer, as an improper fit can compromise the integrity of the conduit entry seal and metallic bonding path.

Technical Specifications

• Knockout Size (From): 3/4 inches
• Knockout Size (To): 1/2 inches
• Material: Steel
• Pack Quantity: 500 per pack
• Package Dimensions (L x W x H): 8.25 inches x 5.75 inches x 6.00 inches
• UPC: 78599144552

Standard Information

• Brand: ABB
• Manufacturer Part Number: WA121