Ultra High-Pressure Hydraulic Products, Couplings & Nipples

Series 125 - 29,000 PSI (2000 bar)

  • High working pressure
  • Compact design
  • Unique sealing design
  • Non-drip on connection and disconnection
  • Dust caps included as standard
  • Nipple without valve available


Series 125 is a CEJN original with extremely small outside dimensions and a patented seal design. Non-drip connection and disconnection are standard on the CEJN high pressure range. All exposed components are made of zinc plated steel. Plastic dust caps are standard on both the coupling and nipple. The range is primarily recommended for nut runners, bearing pullers, etc.


Couplings Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 125 1202 101251202-G 1/4"64.3302440-50CMS*


Nipples without valve Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Male thread 10 125 5252 101255252-G 1/4"42.525.422100-110W*


Nipples Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 125 6202 101256202-G 1/4"3825.42240-50CMS*


*CMS= Cejn metal seal (120° cone), T1= rubber metal seal (19 950 0061), T2= rubber metal seal (19 950 0062), T3= rubber metal seal (19 950 0063), T4= high strength rubber metal seal (19 950 0083), W= copper washer (09 950 4600).
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: 2.5 mm (3/32")
Flow capacity: 5.8 l/min (1.3 GPM UK)
Max. working pressure: 200.0 MPa
Min. burst pressure: 400.0 MPa
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Hardened, zinc chromate plated steel
Material nipple: Hardened, zinc chromate plated steel
Material seal: Nitrile (NBR) other sealing material on request

Flow capacity is measured at 5.8 PSI (4 bar) pressure drop.

Oil Flow
Pressure drop bar (PSI) Series 125 - 29,000 PSI (2000 bar) Flow l/m (GPM)

Available files for download

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