Description
Conical ground joint stopper, brown, Boro 3.3, NS 24/29, ground provides a reliable seal for laboratory glassware equipped with standard conical joints of NS 24/29 size. Fabricated from borosilicate glass Boro 3.3, the stopper incorporates a precision-ground surface that ensures a tight, leak-resistant fit with matching sockets. The brown colouration offers protection for light-sensitive materials against unwanted photochemical effects during reactions or storage. Suitable for organic chemistry, distillation, sample preparation and routine analytical work, it maintains chemical inertness and mechanical stability under normal laboratory conditions. The conical design follows established joint standards, allowing seamless integration into existing glassware sets comprising flasks, condensers and adapters. Available as a single unit from manufacturer Brand, this stopper supports consistent experimental performance in both research and teaching laboratories. Its robust construction facilitates repeated use while preserving joint integrity across a variety of solvent and reagent systems. Compact form factor aids organised storage and quick selection within busy lab environments focused on precise and safe handling of chemical substances.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Conical ground joint stopper
- Material: Boro 3.3 borosilicate glass
- Colour: Brown
- Joint size: NS 24/29
- EAN: 4033378489913
- Technical Information Sheet:
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Questions about Conical joint stopper, amber, Boro 3.3, NS 24/29, honed
What is this article?
Conical joint stopper, amber, Boro 3.3, NS 24/29, honed is the article on this page. Luminix Health distributes BRAND 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.