The patented screw-in-fittings from Eisele

The screw-in-fittings with full nominal diameter are flow optimised and achieve a very high tube holding force. That is why they ensure a reliable tube connection also in case of tube movement, tensile loads, impacts and vibrations at the machine. The stainless steel screw-in fittings of Series 4500 are suitable for use with all media.

The non-corrosive and acid-resistant connection system of stainless steel 1.4301/1.4307/1.4404 is designed for fast connection and disconnection of pneumatic and vacuum tubes in food and pharmaceutical environments. The series is designed for intuitive operation and disconnection even after extended periods.


The patented screw-in fittings with full nominal diameter fulfil the most stringent requirements for tube holding force and are suitable for use with all media.

  • Temperature: -20 to +120 °C
  • Working pressure: -0.95 to +16 bar
  • Media: Coolant, air, vacuum and other media
  • Material: Stainless steel 1.4404
  • Small, compact, user-friendly, non-corrosive and acid-resistant, full flow


1. Insert the union nut over the tube

2. Press tube fully into the fitting,
a slight twisting movement facilitates insertion

3. Tighten union nut to stop by hand or with an open-end wrench

Additional information

Our product catalogue provides everything you need to know about the products of Series 4500 and the LIQUIDLINE.

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For closed coolant systems with special requirements for zero leakage, corrosion resistance and durability. Reliable tube connection also in case of tube movement, tensile loads, impacts and vibrations at the machine.

We also manufacture

We deliver more than just our catalogue items. We also develop alternative custom solutions for your application. Do you need other materials, custom connection combinations, small sizes, special dimensions, custom combinations or special accessories? We advise you personally. Around 2,000 special custom solutions that have already been added to Eisele’s regular product line speak for themselves.

Ask us. We will find a solution for your connection!