Description
PTFE ground joint stopper NS 14/23 is a durable laboratory closure engineered for standard conical ground joints used throughout organic synthesis, sample storage and analytical workflows. The polytetrafluoroethylene construction delivers a hermetic seal that minimises vapour loss and prevents ingress of atmospheric moisture or contaminants. Chemically inert PTFE withstands a broad range of solvents, mineral acids and alkaline media without swelling or degradation, supporting clean handling of reactive or high-purity substances. The stopper remains dimensionally stable and fully functional at temperatures up to 270 °C, making it suitable for heated apparatus and warm storage conditions. Its NS 14/23 taper fits common laboratory flasks, adapters and receivers, allowing rapid exchange without grease when a dry seal is preferred. Offered as one piece with a net weight of 0,014 kg from manufacturer Labbox, this plastic ground joint stopper combines thermal endurance, chemical resistance and a reliable hermetic fit for routine and specialised laboratory applications.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: PTFE
- Joint size: NS 14/23
- Seal type: Hermetic
- Max. temperature: 270 °C
- EAN: 8434868056268
- GTIN: 08434868056268
- Technical Information Sheet:
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Questions about Flat head stopper, PTFE, 14/23
What is this article?
Flat head stopper, PTFE, 14/23 is the article on this page. Luminix Health distributes Labbox 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.