Brass DN 40 hydraulic coupling socket with 1 1/4 inch female NPT threads. They are typically used for liquid lines to quickly connect and disconnect secure connections.
The 1 1/4 inch female NPT threads allow for it to be threaded onto a matching male threaded part. The maximum operating pressure is 100 bar (1450 psi). The coupling is suitable for temperatures between -25 to 160 °C (-13 to 320 °F). The seal material is FKM. The coupling complies with the ISO 7241-1 B standard.
Pros:
- Adheres to ISO 7241-1 B worldwide standard
- They can be combined with other manufacturers, such as Parker, Rectus, Cejn, Stucci, Faster or Snap-Tite
- Brass or stainless steel couplings are suitable for applications with high demand for chemical resistance
Specifications
Connection size : 1 1/4 inch
Nominal diameter (mm) : 40
Plug diameter : 44.5 mm
Socket diameter : 75 mm
Connection type : Inner thread conical (NPT)
Material : Brass
Seal material : FKM (FPM)
Max pressure at 20 °C (bar) : 100
Min temperature (°C) : -25
Max temperature (°C) : 160
Standard : ISO 7241-1 B
Shape : Coupling (female)
With dust cap : No

![FKM O-ring 9 x 1mm (OD 11mm) 80 Shore A [50 Pieces]](https://www.drillforgepro24.com/wp-content/uploads/2026/06/or.19a44f36_14c05a4b-e320-4191-a1ac-af798b1c5adb.webp)
![FKM O-ring 8 x 1.9mm (OD 11.8mm) 80 Shore A [50 Pieces]](https://www.drillforgepro24.com/wp-content/uploads/2026/06/or.19a44f36_dc3b6201-8fc1-4bae-8a45-6c00a3954c95.webp)
![FKM O-ring 8.73 x 1.78mm (OD 12.29mm) 80 Shore A [50 Pieces]](https://www.drillforgepro24.com/wp-content/uploads/2026/06/or.19a44f36_60524cd0-7ccf-4edb-98ed-7dad6c21420f.webp)
![FKM O-ring 8.5 x 1mm (OD 10.5mm) 80 Shore A [50 Pieces]](https://www.drillforgepro24.com/wp-content/uploads/2026/06/or.19a44f36_2b77ae00-bf13-4bcd-84a2-e90c57983769.webp)
Reviews
There are no reviews yet.