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Gray aluminum conduit plug with male threads, 5/8 inch long, 2 inch square profile

Killark

Killark CUP-3 conduit plug 1 in threaded copper plain gray

SKU CH-V114-DE719

Seals 1-inch threaded conduit openings in hazardous locations with a plain gray copper plug rated for Class I, II, and III environments

  • Product typeCable Management & Conduit
  • Threaded 1 in male ends seal hazardous conduit runs
  • Copper-free aluminum body resists corrosion in harsh environments
  • Rated for Class I, II, III hazardous locations
  • Compact 5/8 in length fits tight junction boxes
  • Lightweight at 0.07 lb for easy handling

Hazardous-location conduit plug

This Killark CUP-3 plug seals a 1-inch threaded conduit opening in hazardous areas. It carries Class I, Groups A, B, C, D and Class II, Groups E, F, G ratings for explosion-proof installations. The male-to-male NPT threads connect directly to a hub or taped hole. Plain aluminum construction resists corrosion in industrial environments.

Class I Division 1 rating

The fitting is certified for Class I, Zone 1, Groups IIC, IIB, IA and Class III locations. This rating determines whether the plug meets the area classification for your project. Overall length is 5/8 inch with a 2-inch square profile. Weight is 0.07 lb for lightweight handling.

Suits electricians sealing classified conduit runs

Installers closing unused hub entries in petrochemical, grain or dust-hazard plants will find the rating match they need. Buyers who require a larger trade size or a different thread type must select another fitting. The plain finish offers no colour coding for circuit identification.

How it compares

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

Price $4.99
Cheaper than about 90% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameHUBBELL KILLARK
Product typeCable Management & Conduit

Questions about this item

What does the 1 in trade size mean when the plug is installed in a conduit system?

The 1 in trade size matches a 1 in conduit fitting, so the plug threads directly into a hub or taped hole of that size without adapters.

How does the male NPT thread affect the seal in a hazardous location?

The 1 in MNPT ends engage a female NPT hub to form the flame-tight joint required for Class I, Zone 1 and Class II hazardous-area ratings.

What clearance is needed to fit the 5/8 in long by 2 in wide body into an enclosure?

The plug needs at least 5/8 in of thread depth and a 2 in by 2 in face area on the enclosure wall for the straight-oriented body to seat fully.

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