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Gray PVC-coated copper hazardous-location plug with 3/4 inch threaded end

Killark

Killark CUP-2 Haz Loc Plug 3/4 in Threaded Copper PVC Coated Gray

SKU CH-B5FB-K5JNJ

A hazardous-location conduit plug with 3/4-inch male threads and PVC coating for corrosion resistance

  • Product typeCable Management & Conduit
  • Hazardous-location rated for Class I, II, III divisions
  • Male-to-male threaded ends fit 3/4 in conduit hubs
  • PVC-coated aluminium resists corrosion in harsh environments
  • Compact 5/8 in length allows tight-space installation
  • Lightweight at 0.04 lb for easy handling

Hazardous-location conduit plug

This Killark CUP-2 blank plug seals a 3/4-inch threaded conduit hub in areas rated Class I Division 1 and 2, Class II Division 1 and 2, and Class III Division 1 and 2. The PVC-coated aluminum body resists corrosion while maintaining the explosion-proof integrity of the raceway system. Installers use it to close unused entries on enclosures or junction boxes in petroleum, chemical or grain-handling facilities. The male NPT threads engage directly with a matching female hub.

PVC coating and hazardous ratings

The gray PVC coating adds a protective barrier against chemical splash and moisture without changing the plug’s certified explosion-proof performance. Because the fitting carries ratings for Groups A through G, it suits environments where flammable gases, vapours, combustible dusts or ignitable fibres may be present. The coating also simplifies visual inspection for damage in harsh industrial settings. No additional sealing compound is required for the coated threads.

3/4-inch trade size and weight

The plug fits a 3/4-inch trade-size conduit hub and weighs 0.04 lb, making it a lightweight closure for standard rigid or IMC raceways. Its overall length is 5/8 inch, so it adds minimal protrusion inside the enclosure. Buyers who need a different trade size or a non-hazardous plug will not find a match in this model. The male-to-male thread gender is fixed and cannot be adapted to female-threaded openings.

How it compares

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

Price $2.99
Cheaper than about 95% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameHUBBELL KILLARK
Product typeCable Management & Conduit

Questions about this item

Will the 3/4 in MNPT threads on this Killark CUP-2 plug require re-taping or sealant replacement over time?

The male NPT threads rely on thread tape or sealant applied at installation; re-taping is only needed if the plug is removed and reinstalled, not as routine maintenance.

What is the first limit reached when this hazardous-location plug is used continuously in a Class I Division 1 environment?

The plug carries no electrical or thermal rating of its own; the limiting factor is the conduit system's approved fill and temperature rating, not the blank plug itself.

Does the aluminum body with plain finish generate noticeable heat or noise when left installed all day?

As a passive blanking plug with no moving parts or current path, it produces no noise and negligible heat; the 0.04 lb aluminum body simply matches ambient temperature.

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