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by Killark 

Catalog ID: 2HKB-B-GL

HK Series, 3-1/2" Internal Diameter Round Body Double Port, 2" Lens and Flat Cover, Class I, II, III, BCDEFG, UL/CSA/FM, Cast Aluminum, Type 4, Instrument Enclosure

  • Compact round body instrument enclosures with threaded glass lens screw covers provide easy access to interior.
  • High strength, lighter weight, corrosion resistant copper free cast aluminum construction.
  • Glass lens made of tempered sode lime.
  • Cover o-ring, Nitrile (BUNA-N) material, supplied standard supplied standard for a Type 4X rating.
  • Cast mounting lugs are standard on all boxes.
  • Internal ground screw supplied on all boxes.
  • Electrostatically applied gray powder epoxy/polyester finish on exterior of box and covers.
  • Offset feed-thru conduit openings (3/4” NPT) for maximum use of interior volume.
  • Interior "X”-configuration mounting pad for instrument/device cast into the bottom of the box provided for flexibility.
  • Covers have shrouded tamper resistant set screws as standard.

Enclosures are explosion proof, dust/ignition proof, weather proof, and tamper resistant. HK Series boxes covers are cast from a copper-free aluminum alloy. Neoprene O-rings are provided with HK boxes to assure water resistance in NEMA 4/IP66 conditions.

Product Details


Application Instrumentation housed in HK Series enclosures typically used to measure, detect, monitor, transmit, and control industrial processes and systems. HK Series enclosures are suitable for a broad range of applications, meeting both domestic and international
Color Gray
Cover Type Threaded
EU RoHS Indicator Contact Manufacturer
Material Copper-free aluminum
Series HK
Type Enclosure, Blank Cover, & Lens Cover
UPC 783936295480


Gross Weight with Packaging 4.9

Certifications and Compliance

CSA File Number LR11716
Hazardous Rating(s)
  • Class I, Divisions 1 & 2, Groups A(suffix GA) B, C, D
  • Class I, Zones 1 & 2, Groups IIB+H2, IIA
  • Class II, Divisions 1 & 2, Groups E, F, G
  • Class III, Divisions 1 & 2
UL File Number E83696