Description
Cone NS 7/16 DURAN is a precision male ground-glass joint manufactured to DIN 12249 from DURAN borosilicate tubing. Featuring an outer diameter of 6 mm, a length of 120 mm and a wall thickness of 1,5 mm, this NS 7/16 cone delivers a robust, standardised connection for laboratory glassware assemblies. Made from borosilicate glass 3.3, the DURAN material offers excellent chemical resistance and thermal performance for everyday synthesis, distillation and reaction work. The cone from manufacturer Witeg weighs approximately 0,006 kg and is supplied as a single piece, ready for integration into modular apparatus. Precise grinding ensures tight, reproducible seals with matching NS sockets, supporting leak-resistant setups in research, teaching and industrial quality-control laboratories. The NS 7/16 size suits applications that need a slightly larger bore than the smallest norm joints while remaining compact. This DURAN component conforms to established ground-joint dimensions and fits seamlessly into existing borosilicate glass systems used across chemical and life-science laboratories.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Joint size: NS 7/16
- Standard: DIN 12249
- Material: Borosilicate glass 3.3
- Trademark: DURAN ®
- Outer diameter: 6 mm
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Questions about ST-cone ST7/16 Duran
What is this article?
ST-cone ST7/16 Duran is the article on this page. Luminix Health distributes Witeg 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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.