Description
Ground joint stopper NS 29/32 is a hollow borosilicate glass 3.3 stopper intended for sealing larger standard ground-joint glassware in the laboratory. It combines a hexagonal grip for firm, controlled handling with a closed tip that supports clean closure of flasks, reactors and related apparatus carrying NS 29/32 joints. The hollow design keeps the stopper light while still providing a stable seal for mixing, reflux or temporary storage of reagents. Delivered as a pack of 10 pieces from manufacturer Marienfeld, the set is practical for equipping several setups or maintaining spare stock. Borosilicate glass 3.3 offers reliable thermal and chemical resistance for common laboratory solvents, aqueous solutions and moderate temperature variations. Easy grip geometry aids insertion and removal without undue force, reducing the risk of joint damage. These stoppers serve research, quality-control and educational laboratories that require durable, reusable ground-joint closures for standard NS 29/32 configurations in daily experimental work.
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 29/32
- Design: Hollow with hexagonal grip
- Tip: Closed tip
- EAN: 4250317312266
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Questions about Standard ground-joint stoppers NS 29/32, PU=10
What is this article?
Standard ground-joint stoppers NS 29/32, PU=10 is the article on this page. Luminix Health distributes Marienfeld for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Matériel de laboratoire.
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 Matériel de laboratoire.
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.