Description
DURAN® spherical joint ball, imperial size S 13/5, is a precision borosilicate glass 3.3 component for flexible laboratory glass connections. Conforming to DIN 12244 and DIN 12264, it enables bendable joints of up to 15° depending on joint size; above approximately 5° a reduction in tightness should be expected. The nominal size refers to the nominal diameter of the spherical joint. Joint connections are intended for use with joint grease or PTFE sleeves, while spherical joint clamps with locking screws secure the assembly. This non-self-supporting glass article from manufacturer Duran/DWK Life Sciences is supplied for further processing and integration into glass apparatus and devices. It is suitable for vacuum applications and offers improved releasability thanks to the flexibility of the spherical joint. The single-piece unit has a net weight of 0,008 kg and supports reliable construction of laboratory systems that require limited angular mobility without rigid alignment constraints.
This article is part of Ground-joint glassware (other), in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Borosilicate glass 3.3
- Nominal size: S 13/5
- Standard: DIN 12244 and DIN 12264
- EAN: 4032051051485
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Category
Distillation & extraction glassware
Sub-category
Ground-joint glassware (other)
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Questions about DURAN® Spherical Joint, ball inches size
What is this article?
DURAN® Spherical Joint, ball inches size is the article on this page. Luminix Health distributes DWK Life Sciences 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.

