Hydraulic Products, ISO B Steel Couplings & Nipples

Series 375, DN6.3

  • ISO B Standard
  • Sturdy design
  • Working pressure up to 5076 PSI (350 bar)


CEJN Series 375 features quick-connect couplings and nipples are manufactured according to ISO Standard 7241-1 B. The solid design makes them particularly suitable for strenuous applications in the iron, steel, oil, food and automotive industry.


The couplings and nipples are also available in four larger sizes; DN 10 (Series 475), DN (12.5 (Series 575), DN 20 (Series 675), DN 25 (Series 775). For a stainless steel version see Series 376.

Couplings Part No. Connection Length Diameter Hexagon Seal
Female thread 10 375 1202 103751202G 1/4"572719NBR
 10 375 1402 1037514021/4" NPT572719NBR


Nipples Part No. Connection Length Diameter Hexagon Seal
Female thread 10 375 6202 103756202G 1/4"3520.819NBR
 10 375 6402 1037564021/4" NPT3520.519NBR


Check with an authorized CEJN distributor for availability and prices. Other connections and sealing material on request. Some part numbers may be subject to minimum order quantities. CEJN reserves the right to make changes without further notification. Thread connections are listed according to ISO Standards. All measurements are in mm.
Technical data
Nominal flow diameter: 6.3 mm (1/4")
Max. Suggested Flow: 24 l/min ( GPM UK)
Max. working pressure connected: 35.0 MPa
Max. working pressure disconnected: 35.0 MPa
Min. burst pressure connected: 100.0 MPa
Min. burst pressure disconnected: 100.0 MPa
Temperature range: -20°C — +100°C (-4°F — +212°F)
Material coupling: Steel (zinc plating)
Material nipple: Hardened steel (zinc plating)
Material seal: Nitrile (NBR)
Connectability: Without pressure
Disconnection under pressure: Not allowed
Pressure drop chart
Pressure drop, PSI Series 375, DN6.3 Flow, GPM

Available files for download

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