Description
Expansion adapter KNS 34/35 to HNS 45/40 is a precision ground-glass transition piece designed to connect laboratory apparatus with different standard joint sizes. Form A2 construction provides a core joint NS 34/35 on one side and a socket joint NS 45/40 on the other, enabling reliable expansion from the smaller to the larger joint according to DIN 12257. This configuration is widely used in organic synthesis, distillation and vacuum setups where apparatus sections must be joined without leakage while maintaining chemical resistance and thermal stability of borosilicate glassware. Supplied as a single piece with a net weight of 0,089 kg, the adapter integrates cleanly into existing ground-joint assemblies. Manufactured by Witeg, it supports modular glass apparatus construction in research, quality-control and teaching laboratories. The standardised NS dimensions ensure interchangeability with other DIN-compliant components, simplifying setup changes and reducing the need for custom glassblowing. Ideal for connecting flasks, condensers, receivers and intermediate fittings when joint-size conversion is required.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: Expansion adapter Form A2
- Core joint: NS 34/35
- Socket joint: NS 45/40
- Standard: DIN 12257
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Questions about Expansions adapter CNS 34/35-> SNS 45/40
What is this article?
Expansions adapter CNS 34/35-> SNS 45/40 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.