Description
Spherical joint socket KS 40/25 is a Form A laboratory glassware component engineered for precise spherical ground-joint connections in scientific apparatus. Produced from borosilicate glass 3.3, the socket combines high chemical resistance with excellent thermal-shock stability, making it suitable for a wide range of analytical and preparative workflows. The KS 40/25 joint size mates securely with matching spherical joint balls, while the overall length of 120 mm allows straightforward incorporation into multi-piece assemblies. Net weight is only 0,060 kg, so the piece remains easy to handle during setup and cleaning. This joint-connection product originates from Germany and is supplied by manufacturer Rettberg under the Rettberg ® trademark. Typical applications include vacuum lines, distillation trains, rotary-evaporator adapters and flexible glassware configurations that require angular freedom together with a reliable seal. The borosilicate 3.3 construction withstands repeated heating, cooling and exposure to common laboratory reagents without loss of dimensional integrity, ensuring long service life in demanding research environments.
This article is part of Ground-joint glassware (other), in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Joint size: KS 40/25
- Length: 120 mm
- Material: Borosilicate glass 3.3
- Form: A
- 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 cup size 40/25
What is this article?
Spherical joint cup size 40/25 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.