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UNR Explosionproof Adjustable Fixture Hangers

UNR explosionproof adjustable fixture hangers are used in hazardous areas to mount between a fixture and its outlet box so that the light fixture can be adjusted within the range of 0° to 90°.  UNRs permit hazardous area pendant mount fixtures to illuminate vertical surfaces such as a control board.  They also allow fixtures to hang plumb when the supporting outlet box is not horizontal.

Certifications and compliances


  • Class I, Groups C, D
  • Class II, Groups E, F, G
  • Class III

UL standard

  • UL1203

Design features

  • The fixture is nippled onto one end of the UNR, and the other end of the UNR is nippled into the support outlet box
  • Set screws are located on each end to lock the nipples in place to prevent loosening in relamping or from vibration
  • Adjustment of UNR to the angle setting needed provides for the desired angle of the fixture
  • Degree markings are cast into the UNR
  • Two set screws and a large stud and nut are provided, which are tightened to clamp the unit rigid

Standard materials

  • Feraloy iron alloy with electrogalvanized and aluminum acrylic paint
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