Description
Seal for screw caps with hole is a silicone rubber sealing element designed for GL 18 screw caps that include a central hole. With an opening diameter of 5,5–6,5 mm, it accommodates thin probes, capillaries or tubing while helping maintain a closed system around the insert. Silicone rubber provides flexible seating and broad chemical compatibility for everyday laboratory bottle and flask applications. The seal is supplied as one piece weighing 0,004 kg and originates from manufacturer Lenz for use with matching GL 18 threaded closures. It is suited to sampling ports, sensor feed-throughs and temporary gas or liquid connections where full removal of the cap is undesirable. Clear sizing for thread and aperture simplifies replacement and inventory matching across multi-vessel setups. Deploy this seal in research, quality-control and teaching laboratories whenever a pierced GL 18 cap requires a reliable elastomeric interface for controlled access without compromising basic containment during handling and storage.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Seal for screw caps with hole
- Material: Silicone rubber
- Thread size: GL 18
- Opening diameter: Ø 5,5–6,5 mm
- Weight: 0,004 kg
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Questions about Seal for screw caps with hole, Silicone rubber, GL 18, Ø 5.5-6.5 mm, 1 unit(s)
What is this article?
Seal for screw caps with hole, Silicone rubber, GL 18, Ø 5.5-6.5 mm, 1 unit(s) is the article on this page. Luminix Health distributes Lenz 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?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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.