Description
Expansion adapter KNS 29/32 to HNS 34/35 is a precision ground-joint transition piece that connects a smaller cone joint to a larger socket joint in laboratory glassware assemblies. It features a cone (Kern) NS 29/32 and a socket (Hülse) NS 34/35, manufactured in accordance with DIN 12257 for reliable interchangeability of standard taper joints.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Supplied as a single piece with a net weight of 0,056 kg, this expansion adapter enables secure, leak-resistant coupling when scaling up apparatus from NS 29/32 to NS 34/35. Typical uses include distillation setups, reaction trains and multi-neck flask configurations where joint size conversion is required without compromising vacuum or vapour integrity. The component is produced by Witeg and originates from Baden-Württemberg, Germany.
Its compact form supports straightforward integration into existing Normschliff systems, reducing the need for improvised adapters. Ideal for research, quality-control and preparative laboratories that standardise on DIN ground joints, the piece offers a clean mechanical transition between common European joint sizes while maintaining dimensional consistency across the assembly.
Key features
- Pack size: 1 pc
- Cone joint: NS 29/32
- Socket joint: NS 34/35
- Standard: DIN 12257
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Questions about Expansions adapter ST 29/32 -> ST 34/35
What is this article?
Expansions adapter ST 29/32 -> ST 34/35 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?
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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.