Description
Replacement plug hollow Type N NS 19 is a hollow ground-glass stopcock plug intended for laboratory glassware that employs the larger NS 19 standard taper joint. Built to DIN 12541 specifications, the Type N geometry features a 4 mm bore and is supplied without threaded stopcock securing, simplifying insertion and exchange during routine maintenance. The hollow construction balances mechanical strength with reduced mass, supporting stable sealing at the ground joint while allowing adequate throughput for liquids and gases. This spare component from manufacturer Witeg is used to restore stopcocks and related fittings when the original plug becomes worn or damaged, avoiding full assembly replacement. Delivered as a single piece with a net weight of 0,015 kg, it integrates into existing NS 19 systems found in distillation trains, reaction apparatus and general laboratory setups. Precise dimensional control of the joint and bore helps maintain consistent flow behaviour and leak-tight performance in both atmospheric and vacuum applications across research and teaching environments.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Type: N hollow
- Joint size: NS 19
- Bore diameter: 4 mm
- Standard: DIN 12541
- Thread lock: without threaded stopcock securing
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Questions about ST-seperate plug hollow ST 19
What is this article?
ST-seperate plug hollow ST 19 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Rubber & silicone stoppers, inside Stoppers, caps & closures, in Labware.
A rubber or silicone stopper is pushed into a mouth. The size number corresponds to a top and bottom diameter. Silicone survives higher temperatures and more autoclave cycles. Natural rubber is attacked by oils and by some solvents.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Rubber & silicone stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Ground-joint glass stoppers, Lids & seals and Closures (other).
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.