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by Killark 

Catalog ID: 2HKB

Small compact, 3-1/2 Dia. round body enclosures, two single port depths to choose from. Also available in a double port style. Option of 4 threaded lens covers and 4 blank threaded cover in 4 depths. The HK series is for use in locations that are hazardous, corrosive, wet, hose down, dust, dirty, under both sever hot and cold ambient conditions. They are UL / CSA / FM certified for Class I Groups BCD, Class I Zone 1 & 2 IIB+H2, Class II Groups EFG, Class III, Type 4 & 4X. Also, ATEX, IEC Ex, Ex db IIC, Ex e IIC, Ex tb IIIC T4…T3 IP66 with suffix “C”. Supplied with ¾”NPT conduit openings, additional openings are available. HK series is made of cast copper-free aluminum (less than 4/10 of 1%), supplied standard with a Nitrile (BUNA-N) O-Ring, internal external ground (earth) screws, stainless steel tamper proof locking set screw and electrostatically applied grey powder paint. Internal “X” pad for mounting instruments or terminals.

  • Compact round body instrument enclosure, double cover design for use with threaded screw covers to provide easy access to interior.
  • The enclosure has two separate chambers for isolation between power and instrument.
  • High strength, lighter weight, corrosion resistant copper free cast aluminum construction.
  • Available with a blank or lens cover, flat or domed.
  • Cover o-ring, Nitrile (BUNA-N) material, 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.
  • Box has offset feed-thru conduit openings (3/4” NPT ) on power side and one (3/4” NPT) on bottom instrument side.
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 Only
UPC 783936295466


Gross Weight with Packaging 2.22
Height 4.38 in
Length 6.63 in
Width 6 in

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


Carton Quantity 5