The A-HD Series Flat Face Couplings address residual pressure in a circuit, anywhere thermal expansion of trapped fluid causes pressure to develop. They connect by hand with residual pressure, without releasing any fluid into the environment, due to an internal valving system.

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847-956-9720 or Via Mail


  • Size range: 3/8” thru 1/2”
  • Port options: NPT, SAE, JIC, ORFS, BSP
  • Interchanges with ISO 16028
  • Connect/disconnect up to 1595 psi residual pressure
  • Connect under pressure, by hand
  • Flat face design eliminates leakage and contamination in the circuit
  • Black ID ring
  • Mobile equipment and attachment tools, where sun exposure/temperature change causes pressure due to thermal expansion of trapped fluid
  • Any application where static pressure can get locked into the system

Additional information

Body Size



Port Options

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Port Size


Valve Style

Working Pressure


Download: ISO 16028 ID Chart

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