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Pack of ten threaded malleable iron reducing bushings, chromate and powder coated, electroplated finish

Appleton Century Crofts

Appleton Century Crofts RB400350 Reducing Bushing Conduit

SKU CH-B5EM-BP9AW

A pack of ten threaded reducing bushings connects 3½-inch and 4-inch conduit in hazardous locations

  • Product typeCable Management & Conduit
  • Reduces conduit size from 4 in to 3-1/2 in for flexible installations
  • Threaded female-to-male ends enable secure IMC and RMC connections
  • Malleable iron construction with chromate, powder and electroplated finishes resists corrosion
  • Rated for Class I Division 1 and 2 hazardous locations
  • Pack of 10 bushings weighs 1.06 lb each for easy handling

Trade-size reducing bushing

This Appleton RB400350 reducing bushing connects 3-1/2 inch and 4 inch threaded conduit in hazardous locations. It is a malleable iron fitting with chromate, powder and electroplated finishes rated for Class I, II and III divisions. Each pack contains ten pieces for conduit management projects.

Installers in classified areas

Electricians working in Class I Division 1 or 2 locations with Groups B, C, D and Class II Groups E, F, G will find this fitting approved for their hazardous-area conduit runs. It is not suited for installations that require non-threaded couplings or plastic conduit systems.

Threaded installation notes

The bushing installs by threading the 3-1/2 inch FNPT end onto the smaller conduit and the 4 inch MNPT end into the larger fitting. Careful alignment prevents cross-threading the iron threads. Over-tightening can damage the protective coating and compromise the hazardous-location rating.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $39.99
Pricier than about 58% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameAppleton Electric
Product typeCable Management & Conduit

Questions about this item

What conduit sizes must already be installed for the RB400350 reducing bushing to connect them?

The bushing joins a 4 in threaded rigid metal conduit to a 3 1/2 in conduit, both of which must be in place before installation.

Can the RB400350 be used with existing IMC or rigid metal conduit that is already in service?

Yes, it is compatible with IMC and threaded RMC of the matching 3 1/2 in and 4 in trade sizes.

How can I confirm the bushing is correctly seated after threading it onto the conduit?

The overall length measures 1 7/16 in when fully engaged, and the chromate, powder and electroplated finish should sit flush with no visible gaps.

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