Hydraulic Products, TLX Couplings & Nipples

Series 307 TLX - 3/8”

TLX is a Flat-Face twist lock coupling for the toughest applications in the construction and demolition segment. This super-duty quick connect coupling is designed to work with the highest surge flows and the toughest pressure impulses. TLX is made from high alloy steels with Zinc-Nickel surface treatment for a long life in the harshest conditions. The Series is available in sizes from 3/8” to 1 1/2” to cover most applications.


- The couplings and nipples are also available in 5 other sizes: 1/2” (Series 507) 3/4” (Series 607) 1” (Series 707) 1 1/4” (Series 807) and 1 1/2” (Series 907) https://www.cejn.com/globalassets/documents/brochures/tlx-twist-lock-series/tlx-en.pdf (TLX product folder PDF)

Coupling Part No. Connection
Female thread 10 307 1104 103071104Rc 3/8” fem
 10 307 1204 103071204G 3/8" fem
 10 307 1205 103071205G 1/2” fem
 10 307 1234 103071234G 3/8” JIS ORB fem
 10 307 1404 1030714043/8" NPT fem
 10 307 1604 103071604SAE 3/8”ORB - 9/16-18UNF fem


Nipple Part No. Connection
Female thread 10 307 6204 103076204G 3/8" fem
 10 307 6104 103076104Rc 3/8” fem
 10 307 6205 103076205G 1/2” fem
 10 307 6234 103076234G 3/8” JIS ORB fem
 10 307 6404 1030764043/8" NPT fem
 10 307 6604 103076604SAE 3/8”ORB - 9/16-18UNF fem


Dust cap – aluminum with wire harness Part No.  
Coupling/Female 10 307 1001 103071001 
Nipple/Male 10 307 1051 103071051 


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
Flow rate: 40 l/min (8.8 GPM) @ 3bar ΔP **
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: High alloy steels with Zinc-Nickel surface
Material nipple: High alloy steels with Zinc-Nickel surface
Material seal: Nitrile (NBR)
Max. working pressure connected: 420 bar (6091 PSI)
Max. working pressure disconnected: 420 bar (6091 PSI)
Min. burst pressure connected: 1680 bar (24366 PSI)
Min. burst pressure disconnected: 1000 bar (14503 PSI)
Connectability: Connection with residual pressure only limited by operator strength
Disconnection under pressure: Disconnection with residual pressure in the system is allowed

(**) - If the application is constantly above this flow rate on respective coupling size, a larger coupling size should be considered to avoid too high pressure drop. The couplings can handle much higher flow rate during short time periods, but there is a risk of heat build-up in the system. Surge flows far above normal flow rate is in general not a problem.

- TLX is pressure impulse tested at 7614 PSI (525 bar) for 1.000.000 impulses acc. to ISO 7241-2.

Pressure drop chart
Series 307 TLX - 3/8”

Available files for download

Please complete the form below in order to gain access to downloadable product files. The data you provide is for internal information purposes only and will not be published or made available outside of CEJN.