Description
Polyethylene stopper NS 29/32 is an octagonal laboratory stopper intended for standard ground joints of size NS 29/32. Produced from low-density polyethylene (LDPE), it delivers a dependable seal for larger flasks, reaction vessels and other glassware equipped with conical joints. The stopper follows DIN 12254, ensuring interchangeability with standard European laboratory apparatus. Its octagonal head affords a firm, non-slip grip that facilitates safe insertion and extraction during everyday use. Net weight is 0,009 kg, keeping the component light while remaining sturdy enough for repeated handling. Supplied as a single piece, this item from manufacturer Witeg is appropriate for teaching laboratories, quality-control environments and research settings that require polyethylene’s resistance to many aqueous media. The NS 29/32 joint size is common on medium- to large-scale glassware, so the stopper fits readily into established equipment sets. Overall it provides a practical, cost-effective sealing solution whenever full glass or PTFE inertness is not essential.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 29/32
- Material: Low-density polyethylene (LDPE)
- Shape: Octagonal
- Standard: DIN 12254
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Questions about Polyethylene-stopper ST 29/32
What is this article?
Polyethylene-stopper 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.