Description
Hexagonal stopper, hollow, brown, Boro 3.3, NS 45/40 is a ground-joint laboratory stopper made from borosilicate glass 3.3. The hollow construction reduces weight while maintaining mechanical stability, and the hexagonal head provides a secure grip for insertion and removal. Brown glass offers light protection for light-sensitive contents when the stopper is used with matching brown glassware. Sized to the standard NS 45/40 joint, it ensures a reliable seal on flasks, bottles and reaction vessels equipped with the corresponding ground joint. Supplied by manufacturer Hecht, this stopper is intended for everyday laboratory glassware assemblies where chemical resistance, thermal durability and a precise ground fit are required. The product is packed in units of 100 pieces, making it convenient for stocking common joint sizes in teaching, research and quality-control laboratories that rely on interchangeable borosilicate glass components.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Type: hexagonal stopper
- Construction: hollow
- Colour: brown
- Material: borosilicate glass 3.3 (Boro 3.3)
- Joint size: NS 45/40
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Questions about Hollow glass stoppers amber, hexagonal, Boro 3.3, Size: NS 45/40
What is this article?
Hollow glass stoppers amber, hexagonal, Boro 3.3, Size: NS 45/40 is the article on this page. Luminix Health distributes Hecht 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. Delivery across Europe, two to five days when in stock. 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.
