The NESCO RTSC40 is a 4" raintight set-screw EMT connector built for professional electricians and contractors who need a dependable, weather-resistant connection on demanding job sites. Whether you're running conduit on an exterior wall, through a wet utility room, or into an outdoor enclosure, this connector delivers a secure mechanical bond that stands up to moisture and the elements. Its set-screw design allows for fast, tool-efficient installation — keeping your crew moving without sacrificing code compliance or long-term reliability.

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