Ultra High-Pressure Hydraulic Products, Couplings & Nipples

Series 125 - 36,259 PSI (2500 bar)

  • Quick-action safety lock eliminates any risk of accidental disconnection
  • Compact design with small outer dimensions
  • Non-drip on connection and disconnection
  • High working pressure
  • Unique sealing design
  • Dust caps included as standard


A CEJN original that customers have relied on for over 40 years, Series 125 features extremely small outside dimensions and a patented seal design. The series is a dependable performer on bolt tensioners, bearing pullers and other applications. Non-Drip connection and disconnection are standard, as are plastic dust caps that extend the service life of the entire hydraulic system. The safety lock comes as standard and it adds an extra layer of safety by eliminating any risks of accidental disconnections. All exposed components are made of zinc-plated steel.


Series 125 - 36,259 PSI (2500 bar)
Couplings Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 125 1203 101251203Max. working pressure 36,300 PSIG 1/4"64.3302440-50CMS*
Female thread with 90° angle 10 125 1248 101251248Max. working pressure 36,300 PSIG 1/4"53.8302640-50CMS*
Female thread with angled connection 10 125 1250 101251250Integrated swivelG 1/4"70.852.53440-50CMS*


Nipples Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 125 6203 101256203Max. working pressure 36,300 PSIG 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: 250.0 MPa
Min. burst pressure: 500.0 MPa
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Hardened, zinc-nickel, zinc-iron
Material nipple: Hardened, zinc-nickel
Material seal: Nitrile (NBR) other sealing materials on request

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

Oil Flow
Pressure drop bar (PSI) Series 125 - 36,259 PSI (2500 bar) Flow l/m (GPM)

Available files for download

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