Description
Conical ground joint stopper, brown, Boro 3.3, NS 19/26, ground is a precision sealing component for laboratory glassware fitted with standard conical joints. Made from borosilicate glass of the Boro 3.3 type, it features a carefully ground surface that mates accurately with NS 19/26 sockets to form a secure, chemically resistant closure. The brown tint helps shield light-sensitive contents from photodegradation during storage or reaction work. This stopper is routinely employed in organic synthesis, distillation assemblies, analytical sample handling and general laboratory setups where reliable joint integrity is essential. Its conical geometry conforms to common taper standards, ensuring interchangeability with flasks, adapters and vessels already in use. Supplied as a single piece from manufacturer Brand, the stopper withstands typical chemical and thermal stresses encountered in everyday lab practice. Compact dimensions support convenient handling and organisation within glassware collections. Researchers and technicians rely on the consistent fit and durability to maintain reproducible experimental conditions across teaching, research and quality-control environments focused on safe reagent and intermediate management.
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 19/26
- EAN: 4033378489906
- Technical Information Sheet:
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Questions about Conical joint stopper, amber, Boro 3.3, NS 19/26, honed
What is this article?
Conical joint stopper, amber, Boro 3.3, NS 19/26, 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.