Description
Hexagonal hollow stopper NS 19/26 is a standardised laboratory stopper for sealing ground-glass joints in chemical and analytical glassware. Featuring the NS 19/26 joint size and produced according to DIN 12252, it ensures dimensional compatibility with flasks, adapters and other apparatus that use this common European ground-joint standard. The hexagonal head design offers a firm grip for safe insertion and removal, while the hollow construction keeps the stopper lightweight at a net weight of 0,011 kg. Supplied as a single piece, this component is intended for routine laboratory sealing tasks where a reliable NS hollow stopper is needed. The stopper from manufacturer Witeg is well suited to organic chemistry setups, distillation trains and general laboratory work that depends on interchangeable NS connections. Its DIN-compliant geometry supports reproducible fits and helps maintain closed systems during reactions, storage or transfer steps. Laboratories maintaining glassware inventories will appreciate this NS 19/26 hexagonal hollow stopper as a practical replacement or spare part that matches established joint dimensions without the need for special adapters or custom fittings.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Type: Hexagonal hollow stopper
- Joint size: NS 19/26
- Standard: DIN 12252
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about ST-hollow stopper hexagonal ST 19/26
What is this article?
ST-hollow stopper hexagonal ST 19/26 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.