Description
Hexagonal stopper, hollow, Boro 3.3, NS 29/32 is a laboratory glassware stopper designed to seal apparatus with standard ground joints of nominal size NS 29/32. It is produced from borosilicate glass 3.3 (Boro 3.3), giving the chemical and thermal performance typical of this laboratory glass. The hollow form lowers overall weight, and the hexagonal head offers a positive grip for controlled insertion into and withdrawal from the matching socket. NS 29/32 is a frequently used joint size on larger flasks and intermediate glassware, so a correctly sized hollow stopper supports consistent assembly of multi-piece set-ups. The product is packed in units of 100 pieces, helping laboratories maintain adequate stock for teaching, research and routine analytical work. Available from manufacturer Hecht, it belongs to the standard laboratory material range for interchangeable ground-joint systems. Operators can identify the NS 29/32 size at a glance and pair it with corresponding sockets without guesswork. Hollow construction, hexagonal handling geometry and Boro 3.3 material together provide a practical, reusable glass stopper for everyday sealing of laboratory vessels and connecting pieces.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Product type: Hollow hexagonal stopper
- Material: Boro 3.3 borosilicate glass
- Joint size: NS 29/32
- Head shape: Hexagonal
- Construction: Hollow
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Questions about Hollow glass stoppers hexagonal, Boro 3.3, Size: NS 29/32
What is this article?
Hollow glass stoppers hexagonal, Boro 3.3, Size: NS 29/32 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. 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.