Description
Disposable stopcock with PTFE plug NS 12,5/1,5 mm bore is a compact laboratory shut-off valve for precise fluid handling in chemical and analytical setups. The body is made of borosilicate glass 3.3 and is fitted with a PTFE plug, bent tube connections and a stopcock plug lock. The NS 12,5 joint size and 1,5 mm bore provide fine flow control suited to small-scale reactions and sensitive transfers. This single-use configuration combines the chemical resistance of borosilicate glass 3.3 with the low-friction sealing properties of the PTFE plug. Supplied as 1 pc and weighing only 0,036 kg net, the lightweight valve installs easily in confined glassware arrangements. From manufacturer Rettberg, it serves as a cone stopcock or valve stopcock in research, quality-control and process laboratories. Bent tube ends allow simple connection to tubing or apparatus, while the plug lock secures the PTFE plug against unintended rotation. The combination of materials and geometry makes it suitable for isolation, sampling and metering tasks that require inert surfaces and reliable shut-off performance.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Joint size: NS 12,5
- Bore diameter: 1,5 mm
- Plug type: PTFE
- Technical Information Sheet:
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Questions about Stopcock, straight bore, PTFE-plug size 12,5/1,5 mm bore
What is this article?
Stopcock, straight bore, PTFE-plug size 12,5/1,5 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.