Description
Hollow stopper NS 45/40 brown tinted is an NS hexagonal hollow ground-joint stopper for closing larger standard laboratory glassware. Built to DIN 12252, it offers an NS 45/40 joint together with a drip tip and brown tinting appropriate for light-sensitive applications. The hollow design keeps overall weight moderate while ensuring a firm seal on matching taper joints of flasks, bottles and reaction vessels. Supplied as one piece with a net weight of 0,087 kg, the stopper sits in the plastic ground-joint stopper range used across chemical and analytical laboratories. A hexagonal head allows confident handling and straightforward removal, even under gloved conditions. Brown colouration helps restrict light transmission during storage or brief reaction steps. This stopper from manufacturer Witeg is well suited to organic synthesis setups, sample retention and general wet-chemistry work requiring a dependable NS 45/40 closure. The integrated drip tip aids controlled drainage when the stopper is lifted, supporting tidy laboratory practice and reduced residue transfer.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 45/40
- Type: NS hexagonal hollow stopper
- Standard: DIN 12252
- Feature: With drip tip
- Colour: Brown tinted
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Questions about ST-hollow stoppers hexagonal ST 45/40 br
What is this article?
ST-hollow stoppers hexagonal ST 45/40 br 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.