Description
Bag cock according to Schiff NS 21,5 is a precision laboratory stopcock for controlled fluid and gas handling in glassware assemblies. It is fitted with a hollow NS glass plug and offers a bore of 6,3 mm, giving a clear flow path while maintaining a reliable seal at the conical joint. Overall dimensions are 13 × 120 mm; the component is supplied as a single piece with a net weight of 0,087 kg. This classic Schiff-style bag cock from manufacturer Witeg is intended for standard ground-joint connections of size NS 21,5 and integrates readily into vacuum lines, distillation setups, gas manifolds and general liquid-transfer systems. The all-glass construction supports chemical compatibility across typical laboratory reagents and solvents, while the hollow plug design allows smooth rotation and consistent seating. Suitable for research, analytical and quality-control environments, it functions as a shut-off or regulating valve wherever a secure NS joint interface is required. The compact form factor and defined bore make it a practical choice for modular glass apparatus that must be assembled, cleaned and reconfigured repeatedly.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: Bag cock according to Schiff
- Joint size: NS 21,5
- Plug: Hollow NS glass plug
- Bore diameter: 6,3 mm
- Dimensions: 13 x 120 mm
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Questions about Stopcock acc. Schiff bore-Ø:6,3mm
What is this article?
Stopcock acc. Schiff bore-Ø:6,3mm 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.
