Description
Double cone NS 24/29 is a precision ground-glass joint component manufactured to DIN 12249 PRECISO standards in Form D configuration. Featuring the standard nominal size NS 24/29, this double-ended cone provides male ground joints at both ends for versatile apparatus assembly. Dimensions include an outer diameter of 22 mm, an overall length of 170 mm and a wall thickness of 1,8 mm, giving a robust yet manageable profile for everyday laboratory use. The piece is produced by manufacturer Witeg and is intended for connecting flasks, condensers, adapters and other glassware in distillation, reflux, reaction and vacuum systems. Interchangeable ground joints of this type remain a cornerstone of classical wet-chemistry setups, offering reliable sealing when properly greased or used with PTFE sleeves. Supplied as a single unit with a net weight of 0,042 kg, the double cone supports flexible multi-neck assemblies and temporary connections without extra adapters. PRECISO quality ensures dimensional consistency with matching NS 24/29 sockets.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Type: Double cone, Form D
- Joint size: NS 24/29
- Standard: DIN 12249 PRECISO
- Diameter: 22 mm
- Length: 170 mm
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Distillation & extraction glassware
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Distillation heads, adapters & columns
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Questions about ST-Cones ST 24/29 double
What is this article?
ST-Cones ST 24/29 double 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.
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.
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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.
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.