Description
1-way stopcock bent NS 12,5 is a laboratory glass stopcock with a solid ground-joint plug and bent tube connections for controlled liquid or gas flow in glass apparatus. The bore diameter is 1,6 mm and the nominal joint size is NS 12,5, manufactured in accordance with DIN 12541. Bent side arms allow angled routing of tubing or glass lines while the solid NS plug provides a reliable on/off seal. This stopcock from manufacturer Witeg is intended for chemical synthesis setups, distillation assemblies, vacuum lines and general laboratory glassware where a simple one-way shut-off is needed. Standardised joint dimensions enable straightforward integration into existing ground-joint systems. Supplied as a single piece with a net weight of 0,042 kg, the component supports atmospheric and reduced-pressure applications when correctly greased and seated. Clear NS size and bore identification help laboratory staff select the right fitting for their apparatus and maintain consistent flow control in routine operations.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Joint size: NS 12,5
- Bore: 1,6 mm
- Design: bent tube connections
- Plug type: solid NS plug
- Standard: DIN 12541
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Questions about Stopcock ST 12
What is this article?
Stopcock ST 12 is the article on this page. Luminix Health distributes Witeg 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.