Description
Hollow stopper NS 7/16 brown tinted is a hexagonal standard-taper stopper designed for reliable closure of laboratory glassware with matching NS joints. Manufactured according to DIN 12252, it features a drip tip that aids controlled drainage and reduces residual liquid when the stopper is removed. The brown tinting provides light protection for light-sensitive contents while remaining easy to identify on the bench. This hollow stopper from manufacturer Witeg offers a secure fit for flasks, bottles and other apparatus fitted with NS 7/16 ground joints. The hexagonal head allows convenient handling and torque application without tools. Compact and lightweight, it is intended for routine laboratory sealing tasks in chemical, analytical and educational settings. Supplied as a single piece, it complements standard borosilicate glassware systems that rely on precise NS connections for leak-resistant performance.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 7/16
- Type: Hexagonal hollow stopper
- Colour: Brown tinted
- Standard: DIN 12252
- Design: With drip tip
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Questions about ST-hollow stoppers hexagonal ST 7/16 br.
What is this article?
ST-hollow stoppers hexagonal ST 7/16 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.