Description
Magnetic screw cap N 18-L is a silver open-hole magnetic screw closure for laboratory vials with N 18 neck finish. It combines a centre hole with a Red Rubber/TEF colourless septum laminate, giving reliable resealing after needle penetration while supporting magnetic pickup on compatible autosamplers. Septum hardness is 45° Shore A and septum thickness is 1,5 mm, parameters that help maintain consistent piercing force and low bleed in chromatographic sample introduction. Packed in units of 100 pieces and offered by manufacturer Macherey-Nagel, the cap is intended for routine GC and HPLC workflows, sample storage and transport where a durable elastomer–PTFE barrier is required. The silver exterior aids quick visual sorting on the bench, and the open-top design allows straightforward syringe access without removing the closure. Suitable for standard N 18 screw-thread glassware, it supports secure containment of liquid samples during preparation, queuing and analysis. Laboratories seeking a magnetic N 18 solution with defined septum geometry will find this closure a practical match for everyday analytical handling.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Type: Magnetic screw cap N 18-L
- Colour: Silver
- Septum: Red Rubber/TEF colourless
- Hardness: 45° Shore A
- EAN: 4046681089060
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Questions about Mg SC N18-H,si, RR or/TEF, 45°, 1.5
What is this article?
Mg SC N18-H,si, RR or/TEF, 45°, 1.5 is the article on this page. Luminix Health distributes Macherey-Nagel 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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.