Description
Conical ground joint stopper in polypropylene, NS 7/16, square hollow design with sealing rings is a lightweight plastic closure for standard ground-joint glassware used throughout chemical and analytical laboratories. Manufactured from polypropylene (PP), the hollow stopper features a square grip disc that allows secure handling and easy insertion or removal even when wearing gloves. Integrated sealing rings improve the fit against the NS 7/16 joint, helping to reduce vapour loss and protect contents during reactions, distillations or temporary storage. The hollow construction keeps overall mass low while maintaining mechanical stability, and the chemical resistance of PP makes the stopper suitable for many aqueous and organic media commonly encountered in routine work. Supplied in packs of 10 pieces from manufacturer Brand, these stoppers offer a practical, reusable alternative to glass stoppers for teaching labs, research benches and quality-control environments. The standardised NS 7/16 taper ensures interchangeability with matching flasks, adapters and apparatus, supporting flexible assembly of experimental set-ups without the risk of frozen glass joints.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Material: Polypropylene (PP)
- Joint size: NS 7/16
- Design: Hollow with square grip
- Sealing rings: Yes
- EAN: 4033378390707
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Questions about Conical joint stopper, PP, NS 7/16 square grip hollow seal. rings
What is this article?
Conical joint stopper, PP, NS 7/16 square grip hollow seal. rings 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.