3C 3D GZ Straight Tube Adapters with Swivel Nut

The core advantages of the 3C, 3D, and GZ swivel nuts lie in their advanced sealing and user-friendly design, ensuring reliability and easy assembly. Each fitting features internal threads with an integrated 24° sealing cone and O-ring. This triple-sealing design creates an ultra-tight, pressure-resistant interface: the 24° cone ensures precise alignment with the mating component; the O-ring provides a flexible, adaptive seal to prevent fluid leakage (even under pressure fluctuations); and the internal threads ensure stable engagement. This combination eliminates the need for additional gaskets, simplifying installation and reducing long-term maintenance risks.

Swivel Nut, Flexible Assembly: The built-in swivel nut allows 360° rotation during installation to accommodate minor misalignments between pipes. This design eliminates the need to twist or reposition the entire piping system, saving time on site and reducing the risk of pipe damage—especially important in complex or space-constrained layouts.

3C, 3D, and GZ swivel nut fittings have a maximum operating pressure of up to 620 bar (9000 psi). This makes them ideal for heavy-duty hydraulic circuits, offshore oil equipment, construction machinery, and industrial press systems.

Available in standard pipe diameters compliant with DIN 2353, these connectors cover two connection categories: light and heavy.

The 24° cone light (DIN 2353) is available in sizes from 06L to 42L and is ideal for applications where lightweight construction is paramount without compromising pressure resistance or sealing performance. The 24° cone heavy (DIN 2353) is available in sizes from 06S to 38S and is designed for heavy-duty applications requiring enhanced structural strength and durability to resist wear, vibration, and harsh operating conditions.

The 3C, 3D, and GZ connectors strictly adhere to two authoritative international standards: DIN 2353 and the ISO 8434 industry standard.

Specification