Beschrijving
Solid replacement plug NS 19 with a 4 mm bore is a ground-joint spare insert for laboratory stopcocks conforming to DIN 12541. This massiv NS-Ersatzküken restores proper sealing performance and flow control in glass stopcock bodies commonly found on burettes, dropping funnels, reaction vessels and manifold systems. The precision-ground taper mates with corresponding NS sockets, while the 4 mm bore delivers a larger cross-section for higher throughput of reagents or process streams when the plug is turned to the open position. Offered as a single unit with a net weight of 0,041 kg, the plug is intended for scheduled maintenance or immediate replacement of damaged stopcock cores. Produced by manufacturer Witeg, the part adheres to recognised European interchangeability standards for laboratory glass joints. It is well suited to chemical, pharmaceutical and academic laboratories that maintain stocks of spare stopcock components to minimise downtime. Clear marking of joint size NS 19 and bore diameter 4 mm facilitates correct pairing with existing glassware and simplifies ordering for glass-blowing workshops and central stores.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Type: Solid NS replacement plug
- Joint size: NS 19
- Bore diameter: 4 mm
- Standard: DIN 12541
- Construction: Solid (massiv)
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Questions about ST-afzonderlijke plug ST 19 massief
What is this article?
ST-afzonderlijke plug ST 19 massief is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Glazen slijpstoppen, inside Stoppen, doppen & sluitingen, in Labmateriaal.
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 Stoppen, doppen & sluitingen. The sub-category is Glazen slijpstoppen. The catalogue is Labmateriaal.
Shelves beside this one are Schroefdoppen & sluitingen, Rubber- & siliconenstoppen, Deksels & afdichtingen and Sluitingen (overig).
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.