UNF, UNY Series Explosionproof Expansion Unions


UNF/UNY expansion unions are designed to be used in all threaded rigid metal conduit systems indoors and outdoors, in hazardous locations to:

  • Connect conduit to conduit
  • Connect conduit to a junction box or device enclosure
  • Compensate for conduit cut too short
  • Allow for expansion and contraction of conduit
  • Connect stub-ups to threaded conduit
  • Replace sections of conduit runs
Sizes 1/2" to 1"
Styles Short and long
Material Steel


  • Compact design
  • Internal beryllium copper grounding spring to ensure positive grounding continuity
  • Knurled surface on body and sleeve allows secure gripping with wrench
  • Steel construction for maximum strength
  • Available in two styles – short length where space is limited, long length when extra expansion is required