Description
Screw closure for narrow-neck bottle 50 ml is a PE-LD laboratory cap designed to seal matching Enghals bottles with a GL 18 thread. Made from low-density polyethylene in a natural colour, this screw closure provides a practical, lightweight seal for 50 ml narrow-neck bottles used in routine chemical handling and sample storage. The GL 18 thread ensures secure engagement with compatible narrow-neck containers, helping to reduce spills and evaporation during bench work, transport or short-term holding of liquids. Offered as a single piece from manufacturer Witeg, the natural PE-LD closure suits everyday laboratory environments where flexible plastic bottle systems are preferred. It complements PE-LD narrow-neck bottles in research, teaching and quality-control settings for aqueous solutions and many common reagents. Simple screw-on operation supports quick opening and closing while maintaining a reliable fit for standard GL 18 narrow-neck laboratory bottles of 50 ml nominal volume.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Type: Screw closure
- Material: PE-LD
- Thread: GL 18
- Colour: Natural
- Suitable for: Narrow-neck bottle 50 ml
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Questions about Closure narrow neck bottle 50ml
What is this article?
Closure narrow neck bottle 50ml is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Labware.
A screw cap has a thread and a liner. The thread has to match the bottle. The liner has to survive the liquid: a pulp liner fails in a solvent that a PTFE-faced liner ignores. The colour of the cap is not the specification.
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 Screw caps & closures. The catalogue is Labware.
Shelves beside this one are Rubber & silicone stoppers, Ground-joint glass 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.