Description
Closed screw cap GL 50 is a laboratory bottle closure engineered for secure sealing of glassware and vessels fitted with a GL 50 thread. Made from polypropylene (PP) and equipped with a PTFE-coated gasket, this fully closed cap forms a reliable barrier that protects samples against contamination, evaporation and unintended vapour exchange during storage and handling. The solid, non-perforated construction is well suited to long-term containment of liquids, powders, buffers and reagents in chemical, pharmaceutical and life-science laboratories. With a net weight of 0,034 kg, the cap remains light in the hand while retaining the mechanical robustness needed for repeated opening and closing cycles. Available as a single piece from manufacturer Witeg, it mates cleanly with standard GL 50 laboratory bottles, media bottles and storage vessels used in research, quality-control and production environments. The PTFE-coated sealing surface improves chemical compatibility at the bottle–cap interface, supporting contact with a broad range of aqueous solutions and many organic media. This closed screw cap is a practical choice for routine laboratory workflows that demand dependable, leak-resistant closures without ports or openings.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Thread size: GL 50
- Design: Closed (solid)
- Material: Polypropylene (PP)
- Seal: PTFE-coated gasket
- Technical Information Sheet:
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Questions about Screw cap, top closed GL 50
What is this article?
Screw cap, top closed GL 50 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.