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Aluminium threaded reducing bushing, plain finish, 1 1/4 in long

Appleton Century Crofts

Appleton Century Crofts RB300-100A IMC Reducing Bushing 1 in x 3 in Threaded

SKU CH-0MP6-WCAYN

Reducing bushing connects 1-inch female to 3-inch male threaded IMC conduit for hazardous locations, rated Class I Division 1 and 2, Groups B, C, D, Class II Division 1 and 2, Groups E, F, G.

  • Product typeCable Management & Conduit
  • Reduces conduit from 3 in to 1 in with threaded ends
  • Hazardous-location rated for Class I Division 1 and 2 environments
  • Aluminium construction with plain finish resists corrosion
  • Weighs only 0.47 lb for easy handling
  • Overall length 1 1/4 in fits tight spaces

Hazardous-Location Reducing Bushing

The Appleton Century Crofts RB300-100A is a threaded reducing bushing built for hazardous environments. It connects 1-inch and 3-inch IMC or threaded rigid metal conduit in Class I, II and III locations. The aluminum body carries a plain finish and is rated for Divisions 1 and 2 across multiple gas and dust groups.

Capacity and Headroom

The fitting bridges trade sizes 1 inch and 3 inches with a 1-1/4 inch overall length and a weight of .47 lb. Its female-to-male NPT threads allow a direct step-down between conduit runs. The hazardous-location rating covers Groups B, C, D and IIA, IIB plus H2, plus Groups E, F, G, so it handles a wide range of explosive atmospheres.

Upgrade Path

This bushing replaces makeshift reducer assemblies that lack hazardous-location certification. The jump is worth it when an installation must meet Class I, Zone 1 or 2 and Class II, Division 1 or 2 requirements without adding extra enclosures. Buyers needing non-threaded or PVC conduit connections will need a different fitting type.

How it compares

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

Price $29.99
Typical for this category: the median of 1,290 items is $28.99.

Specifications

Product
Brand nameAPPLETON ELECTRIC
Product typeCable Management & Conduit

Questions about this item

Will the 1 in FNPT x 3 in MNPT threads mate with my existing IMC conduit?

Yes, the bushing is designed for IMC and threaded RMC conduit with those exact thread sizes.

How can I confirm the hazardous-location rating is active after installation?

Verify the Class I Division 1 and 2 Groups B C D and Class II Division 1 and 2 Groups E F G markings on the body.

Does the box include any locknuts or sealing compound for the 1 1/4 in length fitting?

Only the aluminum reducing bushing is supplied; locknuts and sealant must be purchased separately.

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