Description
Reducing adapter KNS 24/29 → HNS 19/26 is a standard ground-joint reducer for linking laboratory glass components whose nominal joint sizes differ. The piece presents a cone joint NS 24/29 on one side and a socket joint NS 19/26 on the other, providing a clean step-down connection that maintains concentric alignment and the characteristic seal of precision NS joints. Offered by manufacturer Witeg, this reducing adapter is aimed at distillation, reaction and sample-preparation setups in which a 24/29 male joint must mate with a 19/26 female joint without intermediate hardware. It is supplied as one piece with a net weight of 0,016 kg, making it easy to stock and exchange in modular glassware kits. The compact reducing geometry keeps apparatus trains short and mechanically stable on the bench or in the fume cupboard, while remaining fully compatible with common European standard ground-joint systems. Research, analytical and teaching laboratories can use the adapter to reconfigure multi-neck flasks, condensers, receivers and adapters whenever a reliable 24/29 to 19/26 reduction is needed.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Reducing adapter
- Cone joint: NS 24/29
- Socket joint: NS 19/26
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Questions about Reduction adapter ST 24/29-> ST 19/26
What is this article?
Reduction adapter ST 24/29-> ST 19/26 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.
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.

