Ultra High-Pressure Hydraulic Products, Couplings & Nipples

Series 125, 250 MPa

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. All exposed components are made of zinc-plated steel.

Series 125, 250 MPa
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 0.4 MPa pressure drop.

Oil Flow
Pressure drop, MPa
Series 125, 250 MPa
Flow, l/min. (GPM UK)
Couplings Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 125 1203101251203working pressure 250 MPaG 1/4”64.3302440-50CMS*
Female thread with 90° angle 10 125 1248101251248working pressure 250 MPaG 1/4”53.8302640-50CMS*


Nipples Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 125 6203101256203working pressure 250 MPaG 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 0064), 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.

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