Description
1-way stopcock with glass handle NS 21,5 is a Type N laboratory stopcock fitted with a hollow NS plug and glass handle for manual shut-off and metering in glass apparatus. Manufactured in accordance with DIN 12541, it offers a standard ground-joint connection at NS 21,5 and a bore diameter of 6 mm. The hollow plug reduces mass at the sealing interface and turns smoothly in the barrel, while the glass handle ensures a secure grip during adjustment. A threaded stopcock retainer keeps the plug seated and helps avoid accidental release under normal laboratory use. Supplied as a single piece with a net weight of 0,077 kg, this valve is intended for reaction vessels, distillation trains and larger fluid-handling glassware that require a one-path conical stopcock. The NS 21,5 joint size corresponds to common laboratory glass connections, supporting direct integration into existing setups. This component from manufacturer Witeg is part of a proven range of conical stopcocks for chemical and analytical laboratories. The 6 mm bore accommodates higher flow rates where controlled passage of liquids or gases and DIN-compliant dimensions are essential.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: N
- Joint size: NS 21,5
- Bore diameter: 6 mm
- Handle: Glass
- Plug: Hollow NS plug
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Questions about Stopcock glass grip ST 21,5
What is this article?
Stopcock glass grip ST 21,5 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. 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.
