Description
Thread adapter GL 25 to cone NS 19/26 is a precision laboratory transition piece that connects GL screw-thread components to standard ground-joint apparatus. Fabricated from borosilicate glass 3.3, the adapter delivers excellent chemical resistance, thermal stability and mechanical durability required in everyday laboratory work. One end carries a GL 25 thread while the opposite end terminates in an NS 19/26 cone, enabling reliable coupling of threaded bottles, caps or tubing connectors to conical joints used in distillation, reflux, extraction and vacuum systems. With a net weight of only 0,017 kg the compact design remains easy to handle yet robust enough for repeated assembly and disassembly. Produced by manufacturer Rettberg in Germany, the adapter supports modular glassware configurations where leak-tight, inert connections are essential. Its borosilicate 3.3 construction offers a low coefficient of thermal expansion and high surface purity, minimising contamination risks in analytical and preparative chemistry. Supplied as a single piece, this transition fitting simplifies inventory while providing the flexibility needed for research, quality-control and process-development laboratories that rely on standardised NS joints and GL threads.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc(s)
- Product type: Adapter
- Material: Borosilicate glass 3.3
- Thread: GL 25
- Ground joint: NS 19/26
- Technical Information Sheet:
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Questions about Thread adapter GL 25 to cone size 19/26
What is this article?
Thread adapter GL 25 to cone size 19/26 is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Hose connectors, adapters & fittings, inside Tubing, hoses & fittings, in Matériel de laboratoire.
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 Matériel de laboratoire.
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.