Description
DURAN® hexagonal hollow stopper, flat and DG-ground, NS 10/19 provides a reliable glass closure for laboratory apparatus equipped with standard ground joints. Made from borosilicate glass 3.3, the stopper offers excellent chemical durability and thermal resistance suitable for a wide range of laboratory environments. The flat design combined with a diamond-ground (DG) joint surface delivers a precise, leak-resistant seal on matching conical joints. These hexagonal hollow stoppers are routinely used to close volumetric flasks, mixing cylinders, ground-joint flasks and comparable glassware. Sizes follow the standard DURAN® conical joint series, ensuring interchangeability with existing laboratory setups. Offered as a single piece from manufacturer Duran/DWK Life Sciences, the stopper is intended for non-sterile use where a reusable, transparent glass stopper is preferred. With a net weight of 0,003 kg, it remains easy to handle while retaining the mechanical strength and clarity characteristic of borosilicate glass 3.3, making it a practical choice for analytical and general laboratory sealing tasks.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Borosilicate glass 3.3
- Joint size: NS 10/19
- Finish: Flat, diamond-ground (DG)
- EAN: 4032051046078
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Questions about DURAN® Hexagonal Stopper flat, diamond-ground
What is this article?
DURAN® Hexagonal Stopper flat, diamond-ground is the article on this page. Luminix Health distributes DWK Life Sciences for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Lids & seals and Closures (other).
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.