Description
Hexagonal hollow stopper NS 29/32 is a standardised ground-joint stopper for sealing laboratory glassware fitted with a matching NS 29/32 joint. Produced to DIN 12252, it combines a hollow body with a hexagonal head that gives a secure grip when seating or releasing the joint, even when gloves are worn. The NS 29/32 size corresponds to common flasks, condensers and adapters used in distillation, reaction and storage assemblies, so the stopper integrates directly into existing apparatus without extra adapters. Supplied as a single piece with a net weight of 0,024 kg, this plastic normschliff stopper from manufacturer Witeg keeps overall mass low while preserving the dimensional accuracy required for interchangeable ground joints. Laboratories that rely on DIN-compliant glassware will find it a practical spare or replacement part for maintaining reliable closures in everyday organic synthesis, analytical work and general chemical handling. The hexagonal profile supports controlled handling on the bench, and the hollow design suits routine sealing tasks where a lightweight yet stable stopper is preferred.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 29/32
- Standard: DIN 12252
- Design: Hexagonal hollow stopper
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Questions about ST-hollow stopper hexagonal ST 29/32
What is this article?
ST-hollow stopper hexagonal ST 29/32 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.