Description
DURAN® straight stopcock, ground and polished, without key is a precision glass shut-off component designed for combination with PTFE stopcock keys to enable grease-free laboratory work. It provides a 4 mm bore and an NS 14,5 joint with a 1:10 taper. Fabricated from borosilicate glass 3.3, the ground and polished stopcock surface delivers a smooth sealing interface that supports dependable, fat-free operation once a matching PTFE key is installed. This glass article is delivered without the key and is intended for further processing and permanent installation in glass apparatus and laboratory devices. The polished finish helps minimise the use of traditional stopcock grease, supporting cleaner reaction paths and analytical setups. Supplied as a single piece with a net weight of 0,029 kg, the component comes from manufacturer Duran/DWK Life Sciences and is suitable for custom glassblowing and modular laboratory glassware construction. Accurate dimensions and robust material properties make it a practical option for assembling or servicing glass systems that demand controlled flow and contamination-aware handling in research and everyday laboratory environments.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Brand: DURAN®
- Material: Borosilicate glass 3.3
- Bore diameter: 4 mm
- EAN: 4032051055155
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Questions about DURAN® Single Way Stopcock, ground and polished,, without key
What is this article?
DURAN® Single Way Stopcock, ground and polished,, without key 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.