Description
Disposable stopcock with hollow glass plug NS 14,5/2,5 mm bore is a compact laboratory glass valve for controlled fluid handling in chemical apparatus. Fabricated from borosilicate glass 3.3, it features bent tube connections and a stopcock plug retainer. The hollow glass plug is designed for an NS 14,5 ground joint and offers a 2,5 mm bore suited to smaller flow paths. This single-piece component falls within the valves and conical stopcock category and serves shut-off functions in laboratory glassware systems. The stopcock from manufacturer Rettberg weighs 0,039 kg net and is supplied as one piece. Bent tube ends simplify linking to neighbouring tubing or apparatus, while the plug retainer keeps the hollow glass plug in position during operation. Borosilicate glass 3.3 provides the chemical resistance expected of laboratory glassware. The disposable format supports single-use procedures where cleaning and reuse of stopcocks is not desired. Applications include general laboratory valves, conical stopcocks and isolation valves in research and analytical work requiring inert glass surfaces for reliable fluid control.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Plug type: Hollow glass plug
- Joint / bore: NS 14,5/2,5 mm
- Connections: Bent tube ends with plug retainer
- Technical Information Sheet:
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Questions about Stopcock, straight bore, hollow glass plug size 14,5/2,5 mm bore
What is this article?
Stopcock, straight bore, hollow glass plug size 14,5/2,5 mm bore is the article on this page. Luminix Health distributes Rettberg 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.