Description
Solid PTFE NS stopper NS 19/26 is a laboratory ground joint stopper manufactured from polytetrafluoroethylene (PTFE) for closing standard taper joints of size NS 19/26. The solid PTFE body is designed to seat in matching conical ground joints on round-bottom flasks, reaction vessels, adapters and similar apparatus. Polytetrafluoroethylene provides the chemical resistance and inert surface character commonly required for laboratory stoppers in contact with diverse reagents. Net weight is 0,025 kg and gross weight is 0,025 kg; pack size is 1 pc. This solid NS stopper from manufacturer Witeg is part of the plastic Normschliff stopper category and uses a one-piece solid construction rather than a hollow form. The NS 19/26 joint size corresponds to a frequently specified laboratory standard for medium glassware connections. It supports routine sealing tasks in analytical, preparative and educational laboratories where a durable PTFE plug is preferred for NS 19/26 openings. Integrate the stopper into glassware trains that already use NS 19/26 joints for consistent dimensional compatibility across the assembly.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Polytetrafluoroethylene (PTFE)
- Ground joint size: NS 19/26
- Construction: Solid
- Product type: NS ground joint stopper
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Questions about ST-stoppers ST19/26 PTFE solid
What is this article?
ST-stoppers ST19/26 PTFE solid 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.