Description
DURAN® ground cone NS 12/21 is a precision conical joint component for laboratory glass apparatus construction. Made from borosilicate glass 3.3, it follows DIN 12249 Form B and meets elevated surface-roughness requirements. The finer ground finish reduces joint-grease demand and lowers the risk of seizing between mating parts. Conical ground joints remain the most widely used connection in glass apparatus building; they should be operated with joint grease or PTFE sleeves for a reliable seal. KECK™ conical joint clamps form a practical complement for securing the connection during use. This glass article for further processing, from manufacturer Duran/DWK Life Sciences, delivers a dense closure via the standardised ground joint and is intended for incorporation into glass apparatus and instruments. Supplied as a single piece with a net weight of 0,012 kg, the NS 12/21 cone supports compact, leak-resistant assemblies where consistent joint quality and reduced maintenance effort are required in everyday laboratory glassware systems.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Joint size: NS 12/21
- Material: Borosilicate glass 3.3
- Standard: DIN 12249 Form B
- EAN: 4032051046764
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Distillation & extraction glassware
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Distillation heads, adapters & columns
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Questions about DURAN® Standard Cone finished
What is this article?
DURAN® Standard Cone finished is the article on this page. Luminix Health distributes DWK Life Sciences for laboratory use. It sits in Distillation heads, adapters & columns, inside Distillation & extraction glassware, in Labware.
A still head, an adapter or a column is the glass between the boiling flask and the condenser. A Vigreux or packed column gives the vapour a surface so a closer-boiling mixture can separate. The joint sizes at both ends have to match the flask and the condenser.
Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Distillation & extraction glassware. The sub-category is Distillation heads, adapters & columns. The catalogue is Labware.
Shelves beside this one are Condensers, Ground-joint glassware (other) and Soxhlet & extraction apparatus.
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.