Description
Expansion adapter KNS 19/26 to HNS 24/29 is a laboratory ground-joint transition piece that bridges two common standard taper sizes. It features a cone joint NS 19/26 and a socket joint NS 24/29 manufactured to DIN 12257, allowing glassware with a smaller male joint to connect cleanly to apparatus with a larger female joint. Such expansion adapters are standard accessories in distillation, reflux and multi-neck reaction setups where modular NS components must be combined without custom glassblowing. Net weight and gross weight are both 0,03 kg, so the piece adds minimal mass to delicate glass trains while preserving a stable joint interface. Originating from Germany (Baden-Württemberg) and offered by manufacturer Witeg, the adapter supports reproducible assembly of flasks, condensers, receivers and other Normschliff equipment. Supplied as a single piece per unit, it integrates directly into existing laboratory glass systems and helps maintain interchangeability across benches. Research groups, teaching laboratories and routine analytical environments use this type of expansion piece to keep joint connections standardised, quick to reconfigure and consistent with DIN dimensional practice.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Expansion adapter (ground joint)
- Cone joint: NS 19/26
- Socket joint: NS 24/29
- Standard: DIN 12257
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Questions about Expansions adapter ST 19/26 -> ST 24/29
What is this article?
Expansions adapter ST 19/26 -> 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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.