Description
Solid replacement plug NS 19 is a precision ground spare component for laboratory stopcocks that require a solid plug with a defined flow passage. It is specified for nominal joint size NS 18,8 (commonly referred to as NS 19) and features a bore of 6,0 mm, enabling controlled liquid or gas transfer once seated in a matching stopcock barrel. The solid construction provides a stable sealing body for routine glassware maintenance and repair. Supplied as a single piece with a net weight of 0,018 kg, this replacement plug is intended for laboratories that service conical stopcocks rather than replacing complete valve assemblies. The NS spare plug from manufacturer Witeg fits standard taper joint systems used across chemical synthesis, distillation and general analytical setups. By matching the original joint geometry and bore dimension, it restores reliable open/close function and helps keep existing glass apparatus in service. Suitable for Hahnküken replacement duties wherever a solid NS 19 plug with a 6,0 mm bore is specified, it supports consistent laboratory fluid handling without altering the surrounding glassware configuration.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 19 (NS 18,8)
- Construction: Solid
- Bore diameter: 6,0 mm
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Questions about ST-seperate plug, ST 19 solid
What is this article?
ST-seperate plug, ST 19 solid is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
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 Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone 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. 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.