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Southwire RB31 is a threaded hex head reducing bushing made of malleable iron that adapts a 4 in conduit opening to 3 in for IMC and rigid conduit. The RB31 features a rounded bushing ring to protect conductors and measures approximately 5.25 in by 1.775 in. It is designed for commercial, industrial, and residential raceway fittings and provides a secure mechanical reduction between trade sizes.
Threaded malleable iron reducing bushing (4 in to 3 in) with rounded conductor-protecting ring for IMC and rigid conduit
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