Metal reducing washers are precision fasteners made from various metals, designed to adapt conduit fittings or boxes to smaller trade sizes. They feature a flat washer-like body with a larger outer diameter and a smaller inner knockout hole, allowing secure connection between different conduit sizes while maintaining a proper seal. These washers are commonly used with locknuts to reduce the opening in junction boxes, enclosures, or panels from one trade size to another.
They ensure code-compliant installations by providing a continuous metal path for grounding and preventing gaps around the conduit entry. Reducing washers are essential for transitioning between EMT, rigid, or IMC conduits of differing sizes in electrical applications. Overall, they offer a simple, reliable solution for size adaptation while meeting NEC requirements