Description
DURAN® threaded tube with GL 18 DIN thread and NS cone 14/23 is a precision glass connector engineered for laboratory apparatus assembly. Made from borosilicate glass 3.3, the tube features a screw thread at one end and a standard ground joint core at the other, enabling secure linkage of glassware components from both sides. The Normschliff joint delivers a tight seal, while the DIN thread supports robust screw connections within modular systems. This configuration is well suited to chemical, analytical and preparative workflows that require flexible multi-part glass setups. Supplied as a single piece with a net weight of 0,011 kg, it provides the chemical inertness and thermal stability characteristic of borosilicate 3.3. The item is manufactured by Duran/DWK Life Sciences under the DURAN® trademark for integration into glass apparatus. Threaded pipes of this GL 18 / NS 14/23 combination belong to the special-size range and are not according to DIN ISO. Researchers and technicians gain a reliable, dimensionally accurate interface for custom laboratory glass constructions.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Borosilicate glass 3.3
- Thread size: GL 18
- Ground joint: NS 14/23
- EAN: 4032051033337
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Questions about DURAN® Tube with Screw Thread, with DIN thread, and standard ground cone
What is this article?
DURAN® Tube with Screw Thread, with DIN thread, and standard ground cone is the article on this page. Luminix Health distributes DWK Life Sciences for laboratory use. It sits in Hose connectors, adapters & fittings, inside Tubing, hoses & fittings, in Labware.
A hose connector or adapter joins two lines, or steps one bore down to another. The barb diameter has to match the tube, and the thread has to match the stopcock or the bottle. Most leaks are a mismatch here, not a hole in the tube.
Tubing is how a liquid or a gas moves between two vessels without being poured. Silicone stays flexible and survives repeated autoclaving. PTFE resists almost every solvent and is stiff. PVC is the ordinary flexible line for water and for mild aqueous work. The fitting, not the tube, is what usually leaks: the barb, the thread and the stopcock have to match the tube bore. Glass and plastic apparatus around these lines is indexed under ISO laboratory ware.
Which category should I open next?
The category is Tubing, hoses & fittings. The sub-category is Hose connectors, adapters & fittings. The catalogue is Labware.
Shelves beside this one are PVC, PTFE & other tubing, Stopcocks & valves, Silicone tubing and Tubing accessories.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

