Reduce a 1-1/4" knockout to accept 1" conduit with these Halex zinc-plated steel reducing washers. Used in pairs - one inside, one outside the enclosure - they let you run the smaller trade size out of equipment that was factory-punched for a larger conduit.

• Reduces 1-1/4" knockout to 1" conduit trade size
• Zinc-plated carbon steel for corrosion resistance, indoor or outdoor
• Concave design with raised flange for positive seating in the knockout
• Use one washer inside and one washer outside the enclosure (sold as a 2-pack to do one knockout)
• For use with rigid metal conduit (RMC), intermediate metal conduit (IMC), and EMT
• UL listed and CSA certified
• 2 washers per polybag

Knockout context: Common on subpanel enclosures, larger weatherproof boxes, and disconnect cabinets where the equipment knockout is 1-1/4" but the branch circuit conduit is a smaller trade size.

Conduit context: 1" trade size carries up to (9) #12 THHN or (8) #10 THHN - typical for kitchen / laundry / garage feeders, dedicated EV charger 240V branch, and pool / spa drops.

Installation tip: Seat the inside washer first with its raised flange in the knockout, pass the locknut or connector hub through both washers, then snug the outside washer against the enclosure face. Tighten the connector locknut until the washers grip the panel sheet - do not over-torque or the thin reducer can dish and lose its seal.