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Gray aluminum single-gang electrical box with lug brackets and two opposing hubs

Killark

Killark FXB-4 Electrical Box 15.5 cu in 1 Gang

SKU CH-BKGR-FJ131

Hazardous-location aluminium device box with two hubs, lug brackets and 15.5 cu in capacity for single-gang installations

  • Product typeElectrical Boxes & Covers
  • 5 cu in capacity fits more conductors
  • Aluminium construction resists corrosion in harsh environments
  • UL Listed and CSA certified for code compliance
  • Two hubs on opposite sides simplify conduit routing
  • Rated for hazardous locations for safe industrial use

Electrical box for hazardous locations

The Killark FXB-4 is a single-gang device box rated for hazardous locations and built from aluminum with a gray finish. It provides 15.5 cu in of internal volume for wiring devices in demanding environments. The box carries CSA and UL listings to confirm compliance with safety standards.

Sustained load behavior in harsh conditions

The aluminum construction resists corrosion and dissipates heat during continuous operation in classified areas. Two hubs on opposing sides allow straight-through conduit runs without sharp bends that could stress cables over time. Lug brackets secure the box firmly to structural surfaces, reducing vibration-induced loosening.

Build quality and daily mounting implications

Gray aluminum housing withstands exposure to chemicals, moisture and physical impact better than non-metallic alternatives. The lug mounting style suits surface installations on walls or equipment where a flush opening is not available. Two opposing hubs simplify conduit alignment for installers working in tight or hazardous zones.

How it compares

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

Price $103.99
Pricier than about 76% of the 1,411 comparable items (median $39.99).

Specifications

Product
Brand nameHUBBELL KILLARK
Product typeElectrical Boxes & Covers

Questions about this item

Does the FXB-4 generate any heat or noise when installed in a continuous-duty hazardous location?

The FXB-4 is a passive aluminum device box with no moving parts or electrical components, so it produces no heat and no audible noise during continuous operation.

What mounting hardware or conduit fittings must I already have to install this 1-gang box?

The box includes integral mounting lugs and two 1/2-inch threaded hubs on opposing sides; you supply the conduit, locknuts, bushings and any device screws required for your specific installation.

Can the FXB-4 be used with legacy rigid metal conduit and older explosion-proof devices in an existing Division 1 system?

Yes, the FXB-4 is UL listed and CSA certified for hazardous locations, and its standard 1/2-inch hubs accept legacy rigid metal conduit and mate with existing explosion-proof covers and devices.

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