Description
NS stopper made of polyethylene (PE-HD) NS 45/40 is a laboratory stopper intended for closing standard ground joints on larger glassware. Fabricated from high-density polyethylene (HDPE), it is sized for the NS 45/40 joint commonly found on bigger reaction flasks, receivers and process vessels. The PE-HD material offers dimensional stability together with chemical resistance appropriate for standard laboratory environments, helping to maintain secure seals that minimise evaporation and contamination. Delivered as a single piece, the stopper engages the corresponding ground joint reliably and can be handled repeatedly without specialised tools. This useful accessory from manufacturer Hecht supports daily operations in research, teaching and production laboratories where dependable joint closures are essential. Its polyethylene construction facilitates easy cleaning and direct integration into existing glass assemblies. The NS 45/40 format ensures compatibility with European standard taper joints, positioning the stopper as a convenient spare or replacement part for multi-neck flasks, large adapters and similar apparatus requiring PE-HD stoppers.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: NS stopper
- Material: High-density polyethylene (HDPE)
- Joint size: NS 45/40
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Questions about Stoppers of HDPE, interchangeable NS 45/40
What is this article?
Stoppers of HDPE, interchangeable 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 Matériel de laboratoire.
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 Matériel de laboratoire.
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.