Description
Ground joint stopper, hollow glass, 29/32 LBG 3.3 is a laboratory stopper designed for standard ground-joint glassware. Manufactured from borosilicate glass LBG 3.3, it provides a durable, chemically resistant closure for flasks, adapters and other NS apparatus that use the 29/32 joint size. The hollow construction keeps the stopper light while maintaining a reliable seal on matching ground joints, supporting routine assembly and disassembly in synthesis, distillation and general wet-chemistry work. Supplied as a single piece with a net weight of 0,034 kg, this stopper from manufacturer Labbox fits standard laboratory inventories where interchangeable glass joints are required. LBG 3.3 borosilicate glass is widely used for laboratory components because of its thermal and chemical stability under typical bench conditions. The 29/32 Normschliff format ensures compatibility with common European joint systems, helping laboratories maintain consistent glassware sets without mixed joint sizes. Ideal for teaching labs, research groups and quality-control environments that rely on reusable glass stoppers for temporary sealing of reaction vessels and storage flasks.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: 29/32
- Material: Borosilicate glass LBG 3.3
- Construction: Hollow glass
- EAN: 8434868045279
- Technical Information Sheet:
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Questions about Hollow stopper, standard ground mouth, 29/32, LBG 3.3
What is this article?
Hollow stopper, standard ground mouth, 29/32, LBG 3.3 is the article on this page. Luminix Health distributes Labbox 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.