Description
Screw caps GL 28 are laboratory closures for threaded bottles with a GL 28 neck finish. Made from black plastic and fitted with a PE-LD sealing insert, they deliver a practical seal for routine sample storage, reagent handling and general laboratory workflows. The PE-LD liner supports reliable closure integrity with common laboratory media while remaining straightforward to open and reseal during daily use. Supplied in packs of 10 pieces, the caps help laboratories stock glassware and plasticware systems that rely on the GL 28 thread standard. These screw caps from manufacturer Marienfeld suit everyday laboratory practice where a durable black plastic closure with an integrated sealing insert is required. The standardised GL 28 thread ensures compatibility with matching bottles and flasks widely used in analytical, research and quality-control settings. A robust plastic body combined with the PE-LD gasket aids secure containment during short-term storage and internal transport of liquids and solids. They are a practical choice for labs that need consistent, ready-to-use screw closures for GL-threaded containers without unnecessary complexity.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Thread: GL 28
- Material: black plastic
- Sealing insert: PE-LD
- Suitable for: threaded bottles
- EAN: 4250317314079
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Questions about Screw caps GL 28,
What is this article?
Screw caps GL 28, is the article on this page. Luminix Health distributes Marienfeld 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.