• Hydraulic Couplings Primary
  • Hydraulic Couplings, Series 1 HK to 8 HK Flow Capacity
  • Hydraulic Couplings, Series HK, 1 HK to 8 HK secondary

Series HK Couplings are the most versatile couplings available and are suitable for use with various liquids, chemicals, steam, gases and vacuum. Series HK couplings conform to the dimensional requirements of ISO 7241-1 Series B. Body sizes range from 1/8" to 1".

Features:

  • The coupling that set the industry standard
  • Multiple options make the HK our most versatile coupling series available
  • Brass, steel and stainless steel construction available in all sizes; 1/4" body size is also available in polypropylene
  • End connections are female NPTF, BSPP and SAE o-ring boss
  • Heavy duty steel couplings for use in high impulse service available in most sizes
  • Steam coupling available in 3/8" body size
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    Series

    Body Size

    Temperature Range

    Rated Pressure: Brass

    Rated Pressure: Steel

    Rated Pressure: Stainless Steel

    Rated Pressure: Polypropylene

    List Price

    N/A 1/8 in4.4 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 3,000 psi207 bar N/A 4,000 psi275 bar N/A 5,000 psi344 bar N/A QUOTE
    N/A 1/4 in5.9 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 2,700 psi345 bar N/A 5,000 psi255 bar N/A 3,700 psi255 bar N/A QUOTE
    N/A 3/8 in7.8 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 2,200 psi152 bar N/A 3,700 psi255 bar N/A 3,700 psi255 bar N/A QUOTE
    N/A 1/2 in10.0 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 2,250 psi155 bar N/A 5,000 psi345 bar N/A 4,250 psi293 bar N/A QUOTE
    N/A 3/4 in17.0 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 2,000 psi138 bar N/A 4,000 psi275 bar N/A 3,500 psi242 bar N/A QUOTE
    N/A 1 in19.6 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 1,500 psi103 bar N/A 4,000 psi275 bar N/A 3,000 psi207 bar N/A QUOTE
    N/A 1/4 in5.9 mm N/A +35 to 150 ºF N/A N/A N/A N/A 50 psi4 bar QUOTE
    N/A 1 1/4 in26.7 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 1,200 psi83 bar N/A 1,700 psi118 bar N/A 1,700 psi118 bar N/A QUOTE
    N/A 1 1/2 in35.1 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 1,500 psi104 bar N/A 2,200 psi152 bar N/A 2,200 psi152 bar N/A QUOTE
    N/A 2 3/4 in46.0 mm N/A -40 to 250 ºF-40 to 121 ºC N/A 700 psi49 bar N/A 1,500 psi104 bar N/A 1,500 psi104 bar N/A QUOTE
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