Description
Thread adapter GL 25 to cone NS 29/32 provides a reliable glass-to-glass transition between GL screw threads and larger standard ground joints in laboratory assemblies. Made from high-quality borosilicate glass 3.3, the component combines chemical inertness with superior thermal-shock resistance, making it suitable for a wide range of organic-synthesis, distillation and vacuum applications. The GL 25 thread on one side mates securely with threaded vessels or connectors, while the NS 29/32 cone on the opposite side integrates directly into conventional ground-joint apparatus. Net weight is 0,025 kg, offering a solid yet manageable profile for frequent handling. This adapter from manufacturer Rettberg is manufactured in Germany and functions as a versatile Übergangsstück that maintains seal integrity under both atmospheric and reduced-pressure conditions. The borosilicate 3.3 material ensures low extractables and excellent optical clarity for visual process monitoring. Supplied as one piece, it supports flexible modular setups in research, analytical and preparative laboratories that require standardised connections between GL-threaded and NS-joint glassware without compromising performance or purity.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Adapter
- Material: Borosilicate glass 3.3
- Thread: GL 25
- Ground joint: NS 29/32
- Technical Information Sheet:
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Questions about Thread adapter GL 25 to cone size 29/32
What is this article?
Thread adapter GL 25 to cone size 29/32 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.
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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.