Description
Spherical joint ball KS 35/20 is a precision ground glass component designed as Form B for laboratory spherical joint connections. Manufactured from high-quality borosilicate glass 3.3, it offers excellent chemical resistance and thermal stability required in demanding laboratory environments. The joint size KS 35/20 ensures reliable mating with corresponding spherical sockets, while the overall length of 120 mm provides practical handling and integration into glass apparatus assemblies. With a net weight of 0,045 kg, this single-piece unit supports flexible angular connections typical of spherical ground joints used in distillation, reaction, and vacuum setups. Supplied as one piece from manufacturer Rettberg, the component carries the Rettberg® registered trademark and originates from Germany. Its robust construction as a Schliffverbindung (joint connection) makes it suitable for repeated assembly and disassembly in research and analytical laboratories where leak-tight yet movable glassware interfaces are essential. The clear borosilicate material allows visual monitoring of processes while maintaining dimensional accuracy for consistent performance across standard laboratory glass systems.
This article is part of Ground-joint glassware (other), in Distillation & extraction glassware.
Key features
- Pack size: 1 pc(s)
- Joint size: KS 35/20
- Material: Borosilicate glass 3.3
- Length: 120 mm
- Form: B
- Technical Information Sheet:
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Distillation & extraction glassware
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Ground-joint glassware (other)
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Questions about Spherical joint ball size 35/20
What is this article?
Spherical joint ball size 35/20 is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Ground-joint glassware (other), inside Distillation & extraction glassware, in Labware.
This is ground-joint glassware that is not a head, a condenser or a Soxhlet: receivers, blank joints, odd adapters. A ground joint is named by the wide end and the length, such as 29/32. Mismatched joints do not seal, even with grease.
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 Ground-joint glassware (other). The catalogue is Labware.
Shelves beside this one are Distillation heads, adapters & columns, Condensers 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.