Description
Reducing adapter KNS 50/42 -> HNS 29/32 is a ground-glass transition fitting designed to bridge a large cone joint with a standard smaller socket in laboratory apparatus. It carries a male cone NS 50/42 (Kern) and a female socket NS 29/32 (Hülse), allowing direct reduction between these common NS sizes for distillation trains, reaction vessels and multi-piece glass setups. The single-piece unit has a net weight of 0,064 kg and seats firmly into matching ground joints to support vacuum-tight and mechanically stable connections. This adapter from manufacturer Witeg forms part of the normschliff reducing range used wherever flasks, condensers or columns of differing joint diameters must be coupled. It is well suited to preparative organic chemistry, process development and teaching laboratories that rely on interchangeable NS glassware. Clear joint geometry simplifies assembly and disassembly while preserving alignment in complex apparatus. A practical choice for labs standardising on European ground-joint systems.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: Reducing adapter (normschliff)
- Cone joint (Kern): NS 50/42
- Socket joint (Hülse): NS 29/32
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Questions about Reduction adapter ST 50/42 -> ST 29/32
What is this article?
Reduction adapter ST 50/42 -> ST 29/32 is the article on this page. Luminix Health distributes Witeg 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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.