Description
Hexagonal hollow stopper NS 29/32 is a precision ground-glass laboratory stopper manufactured from borosilicate glass 3.3 for secure sealing of glassware with standard joint size NS 29/32. Its hexagonal head enables confident handling when fitting or removing the stopper, and the integrated safety groove assists in keeping it seated during use. Produced to DIN 12252, the hollow design reduces weight while retaining the mechanical integrity and chemical resistance characteristic of borosilicate glass 3.3. The finely ground joint surface promotes smooth engagement with matching female joints and a reliable, leak-resistant closure under ordinary laboratory conditions. This stopper is appropriate for organic synthesis, distillation trains, reflux apparatus and general connections on flasks and adapters. Supplied as a single piece with a net weight of 0,029 kg from manufacturer Witeg, it offers a durable NS 29/32 closure option for routine laboratory glassware workflows that demand consistent fit and long service life.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Joint size: NS 29/32
- Design: Hexagonal hollow with safety groove
- Standard: DIN 12252
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Questions about hollow-stopper hexagonal ST 29/32 Boro.
What is this article?
hollow-stopper hexagonal ST 29/32 Boro. 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.