Description
Hexagonal hollow stopper, NS 24/29, closed pointed is a precision ground-joint laboratory stopper manufactured from borosilicate glass 3.3. This Form C design features a hexagonal head for secure handling and a pointed closed tip that ensures reliable sealing of matching NS 24/29 sockets. The hollow construction keeps the net weight to only 0,017 kg while retaining full mechanical strength and thermal-shock resistance typical of borosilicate 3.3. Ideal for closing flasks, condensers, adapters and reaction vessels in organic synthesis, distillation and analytical workflows, the stopper maintains an inert barrier against moisture and contamination. Produced in Germany by manufacturer Rettberg, each unit is supplied as 1 pc and conforms to standard Normschliff dimensions for interchangeability across laboratory glassware systems. The material’s inherent chemical durability allows repeated use with acids, bases and organic solvents without surface degradation, supporting consistent performance in both routine and demanding experimental setups.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 24/29
- Material: Borosilicate glass 3.3
- Design: Hexagonal hollow, pointed closed (Form C)
- Product type: Ground joint stopper
- Technical Information Sheet:
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Questions about Hexagonal stopper, size 24/29, glass, hollow, pointed
What is this article?
Hexagonal stopper, size 24/29, glass, hollow, pointed is the article on this page. Luminix Health distributes Rettberg 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.