Reduce a 1-1/2" knockout to accept 1/2" 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 1-1/2" knockout to 1/2" 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 can openings, larger meter sockets, and industrial enclosures where the manufacturer punched a 1-1/2" knockout but the actual branch circuit is run in smaller conduit.

Conduit context: 1/2" trade size carries up to (3) #12 THHN or (5) #14 THHN per NEC Table 1 fill rules - typical for branch circuit lighting drops, switch loops, and small fixture runs.

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.