Description
Disposable stopcock with hollow glass plug NS 21,5/6,0 mm bore is a laboratory shut-off valve for controlled fluid handling in chemical and analytical work. It combines a hollow glass plug, bent tube connections and a stopcock plug lock, all executed in borosilicate glass 3.3. The NS 21,5 joint size together with the 6,0 mm bore supports reliable regulation of liquids and gases in glassware assemblies. This single-use design offers convenience while retaining the chemical resistance and thermal stability typical of borosilicate glass 3.3. Supplied as 1 pc and weighing 0,091 kg net, the compact valve integrates readily into existing apparatus. From manufacturer Rettberg, the component serves cone-stopcock and valve-stopcock functions required in organic synthesis, analytical procedures and process-development laboratories. Bent tube ends simplify connection to tubing or rigid lines, while the plug lock secures the hollow glass plug against accidental movement. Researchers and technicians use it for isolation, sampling or transfer tasks where inert glass surfaces and precise flow control are essential.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Joint size: NS 21,5
- Bore diameter: 6,0 mm
- Plug type: Hollow glass
- Technical Information Sheet:
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Questions about Stopcock, straight bore, hollow glass plug size 21,5/6,0 mm bore
What is this article?
Stopcock, straight bore, hollow glass plug size 21,5/6,0 mm bore is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Stopcocks & valves, inside Tubing, hoses & fittings, in Labware.
A stopcock opens and closes a line, or directs it between ports. Glass stopcocks have a ground plug that needs grease or a PTFE key. The bore decides the flow. A two-way and a three-way key are different parts.
Tubing is how a liquid or a gas moves between two vessels without being poured. Silicone stays flexible and survives repeated autoclaving. PTFE resists almost every solvent and is stiff. PVC is the ordinary flexible line for water and for mild aqueous work. The fitting, not the tube, is what usually leaks: the barb, the thread and the stopcock have to match the tube bore. Glass and plastic apparatus around these lines is indexed under ISO laboratory ware.
Which category should I open next?
The category is Tubing, hoses & fittings. The sub-category is Stopcocks & valves. The catalogue is Labware.
Shelves beside this one are Hose connectors, adapters & fittings, PVC, PTFE & other tubing, Silicone tubing and Tubing accessories.
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. Delivery across Europe, two to five days when in stock. 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.
