Appleton RB300-100 Conduit Fittings

Appleton RB300-100 reducing bushing transitions a 3 in trade-size entry to a 1 in trade-size conduit in threaded RMC and IMC systems, enabling a secure knockout-to-conduit connection in hazardous locations. It features 1 in FNPT on the small end and 3 in MNPT on the large end, is typically made of iron, and weighs about 1.3 lb with an overall length near 1-1/4 in. Finishes vary by stock and may include zinc electroplate with chromate or epoxy powder coat to resist corrosion. This HazLoc-rated fitting is designed for use with threaded conduit runs and provides UL 886 and CSA C22.2 approvals for hazardous environments; typical ratings correspond to Class I (Division 1 and 2) and Zone 1/2 environments, with the potential for Class II and III applicability depending on exact catalog variant. Typical ends are 1 in FNPT × 3 in MNPT, making it suitable for reducing conduit entries in heavy-wall RMC and IMC installations while maintaining a secure, code-compliant interface.