Description
DURAN® glass stopper, clear and solid with standard ground joint NS 24/29 and octagonal head is intended for closing glassware items including flasks, separatory funnels and reagent bottles that have matching ground joint necks. Made wholly from borosilicate glass 3.3, the stopper comprises only glass components and is therefore appropriate for storing aggressive substances. Its standard taper ground glass joint delivers a tight, leak-proof seal; grease should be applied when the assembly is used under heat or vacuum. Offered in a pack of ten pieces, this octagonal-head stopper from manufacturer Duran/DWK Life Sciences is ideal for the storage of air-sensitive reagents and chemicals as well as hygroscopic solids, granules and powders. When used with soda-lime glass bottles, ensure the temperature difference between bottle and stopper does not exceed 30 °C, otherwise the stopper may become stuck. The solid clear design combines chemical resistance with straightforward handling, supporting reliable laboratory workflows for both short-term and extended reagent storage.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Material: Borosilicate glass 3.3
- Joint size: NS 24/29
- Design: Solid
- Head shape: Octagonal
- EAN: 4032051321397
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Questions about DURAN® Glass Stopper, clear, with standard ground joint, octagonal
What is this article?
DURAN® Glass Stopper, clear, with standard ground joint, octagonal 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.