Description
Cone joint DURAN (Form B) NS 5/13 is a precision ground-glass cone component for standardized laboratory connections. Fabricated from borosilicate glass 3.3, it matches the NS 5/13 joint size and incorporates a tube diameter of 4 mm together with a wall thickness of 0,8 mm. The overall length of 125 mm supplies a practical tubing section for secure integration into multi-part apparatus. Supplied as a single piece with a net weight of 0,002 kg, this Form B cone joint from manufacturer Rettberg is intended for modular glass systems used in organic synthesis, distillation trains, vacuum work and general analytical setups. The DURAN-compatible geometry ensures interchangeability with matching NS 5/13 sockets, producing a reliable seal when used with joint grease or clips. Borosilicate glass 3.3 provides the chemical resistance and thermal-shock tolerance required for repeated heating and cooling cycles with common laboratory reagents. As a Normschliff building block it supports reusable, leak-tight assemblies in research, quality-control and teaching laboratories without permanent joints, enabling flexible apparatus design while maintaining dimensional accuracy and long service life under typical laboratory conditions.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Joint size: NS 5/13
- Material: Borosilicate glass 3.3
- Tube diameter: 4 mm
- Wall thickness: 0,8 mm
- Length: 125 mm
- Technical Information Sheet:
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Questions about Joint cone/DURAN (shape B) sioze 5/13
What is this article?
Joint cone/DURAN (shape B) sioze 5/13 is the article on this page. Luminix Health distributes Rettberg 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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.