Description
Reducing adapter KNS 34/35 to HNS 24/29 is a precision ground-joint transition piece for linking laboratory glassware with dissimilar standard joint sizes. It features a core joint NS 34/35 paired with a socket joint NS 24/29, enabling reliable connection between larger necks and mid-size apparatus components in distillation, reflux and vacuum work. This reducing adapter forms part of the standard Normschliff transition range employed in chemical synthesis, analytical preparation and teaching laboratories. Delivered as one piece with a net weight of 0,03 kg, the compact geometry supports leak-resistant, dimensionally consistent joints when assembling modular glass trains. The adapter from manufacturer Witeg is intended for everyday organic chemistry, sample work-up and general laboratory use wherever European NS joints are specified. Bridging NS 34/35 and NS 24/29 interfaces helps laboratories minimise dedicated glassware stock and speeds interchange of flasks, condensers and receivers. Defined joint dimensions promote quick setup and breakdown while remaining compatible with common laboratory glass systems.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Reducing adapter
- Core joint: NS 34/35
- Socket joint: NS 24/29
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Questions about Reduction adapter ST 34/35 -> ST 24/29
What is this article?
Reduction adapter ST 34/35 -> ST 24/29 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.
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.

