Description
Hexagonal hollow stopper NS 34/35 is a laboratory ground-joint stopper intended for reliable closure of glassware with a standard NS 34/35 joint. Manufactured in accordance with DIN 12252, the stopper features a hollow construction and a hexagonal head that improves grip and control during insertion or removal. This NS 34/35 format matches widely used reaction vessels, condensers and connecting pieces, allowing straightforward use in distillation trains, synthesis setups and sample storage. Delivered as one piece with a net weight of 0,051 kg, the plastic normschliff stopper from manufacturer Witeg offers a lightweight alternative for routine sealing duties while retaining the geometry needed for interchangeable ground joints. The hexagonal profile remains easy to handle when protective gloves are worn, supporting safe bench practice. Suitable as a spare or working component in laboratories standardised on DIN ground-joint systems, it helps maintain consistent, leak-resistant connections across organic, analytical and general chemical workflows that depend on precise NS 34/35 closures.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 34/35
- Standard: DIN 12252
- Design: Hexagonal hollow stopper
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Questions about ST-hollow stopper hexagonal ST 34/35
What is this article?
ST-hollow stopper hexagonal ST 34/35 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.