Appleton Century Crofts RB350-300A Reducing Bushing Conduit

Reducing Bushing 3-1/2 to 3 in

The Appleton Century Crofts RB350-300A is an aluminum conduit fitting that reduces a 3-1/2 inch threaded opening to a 3 inch female thread. It suits electricians and maintenance crews working in hazardous-location installations where IMC or threaded rigid metal conduit must be transitioned safely. The fitting carries Class I Division 1 and 2, Class II Division 1 and 2, and Class III ratings for use in classified areas.

Aluminum construction

The plain-finish aluminum body weighs 0.42 lb and measures 1 7/16 in overall length, making it light enough for overhead work while resisting corrosion in industrial atmospheres. Female NPT threads on the 3 in side and male NPT threads on the 3-1/2 in side allow direct coupling without extra adapters, so conduit runs stay compact inside enclosures or junction boxes.

Limited to NPT-threaded rigid and IMC conduit

The bushing only accepts conduit with standard NPT threads in the 3 in and 3-1/2 in trade sizes; it cannot be used with EMT, PVC or metric-threaded systems. Its hazardous-location certification covers the listed gas and dust groups, but does not extend to unclassified wet locations or non-threaded raceways. Installers must verify that the surrounding enclosure and sealing methods match the same classification.