Description
DURAN® Patent stopcock key with thread, ground, NS 14,5 and 2,5 mm bore is a solid two-way stopcock plug intended for installation in glass apparatus and laboratory devices. The ground DURAN® patent stopcock keys incorporate two approximately parallel oblique bores that support controlled fluid or gas passage in assembled glass systems. Precision-ground surfaces and the integrated thread enable secure seating and reliable sealing within matching NS joints. Fabricated from borosilicate glass 3.3, the key combines chemical durability with the thermal performance required for routine laboratory glassware. This single-piece component is supplied by manufacturer Duran/DWK Life Sciences and is designed specifically for incorporation into glass apparatus and instruments. The solid construction, defined NS 14,5 joint size and 2,5 mm bore make it a practical replacement or build element for standard laboratory setups that rely on interchangeable, ground stopcock fittings. Its geometry and material support consistent operation in typical experimental glass assemblies without additional modification.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Borosilicate glass 3.3
- Joint size: NS 14,5
- Bore diameter: 2,5 mm
- EAN: 4032051043923
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Questions about DURAN® Stopcock Key long for double bore, threaded, ground
What is this article?
DURAN® Stopcock Key long for double bore, threaded, ground is the article on this page. Luminix Health distributes DWK Life Sciences 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. 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.

