Description
Ground joint stopper NS 14/23 is a precision laboratory component for sealing standard ground-glass joints in chemical glassware assemblies. Fabricated from borosilicate glass 3.3, the stopper is hollow and incorporates a hexagonal grip together with a closed tip, providing secure handling and reliable closure. The NS 14/23 joint size matches common laboratory apparatus used in distillation, reflux, reaction vessels and analytical setups. Offered as a pack of 10 pieces from manufacturer Marienfeld, these stoppers deliver the chemical resistance and thermal durability characteristic of borosilicate 3.3 glass. Their hollow construction keeps weight low while preserving mechanical strength, and the hexagonal grip allows controlled insertion and removal without slippage. Suitable for organic synthesis, sample preparation, educational demonstrations and routine quality-control work, the stoppers integrate smoothly into existing ground-joint systems. They maintain airtight seals across a broad range of solvents and reagents, supporting efficient, contamination-free laboratory workflows wherever standardised NS 14/23 connections are required.
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 14/23
- Construction: Hollow with closed tip
- Grip: Hexagonal grip
- EAN: 4250317312235
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Questions about Standard ground-joint stoppers NS 14/23, PU=10
What is this article?
Standard ground-joint stoppers NS 14/23, 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 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.