Description
Hexagonal hollow stopper NS 10/19 is a plastic ground-joint stopper for sealing laboratory glassware with standard NS 10/19 taper joints. Conforming to DIN 12252, it combines a hexagonal head for a secure grip with a hollow body that keeps the net weight to only 0,003 kg. The compact design suits flasks, condensers, adapters and other interchangeable NS glassware used in everyday chemical work. Supplied as a single piece, the stopper from manufacturer Witeg provides a practical closure for organic synthesis, preparative routines and teaching laboratories. Its hexagonal profile remains easy to turn when wearing protective gloves, while the hollow construction limits unnecessary mass without weakening the seal at the ground joint. Gross weight is likewise 0,003 kg, underscoring the lightweight build. Suitable for research, quality-control and educational settings that rely on standardised NS systems, this stopper supports closed reaction setups and helps protect sample integrity during intermediate storage or transfer on the laboratory bench.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 10/19
- Product type: Hexagonal hollow stopper
- Material: category: Plastic
- Standard: DIN 12252
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Questions about ST-hollow stopper hexagonal ST 10/19
What is this article?
ST-hollow stopper hexagonal ST 10/19 is the article on this page. Luminix Health distributes Witeg 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.