Description
Pre-sealed N 24 screw neck vials 20 mL clear provide a ready-assembled glass vial and screw-cap system for larger sample volumes in analytical and laboratory workflows. Each clear vial has an outer diameter of 27,5 mm and an outer height of 57 mm with a flat bottom, giving a stable footprint on the bench and in racks. The vial is factory-closed with an N 24 polypropylene screw cap in white that includes a centre hole and a bonded Red Rubber/TEF colourless septum. Septum thickness is 2,5 mm with a hardness of 45° Shore A, supporting dependable sealing for sampling and storage tasks that use the N 24 thread. Offered in packs of 100 pieces from manufacturer Macherey-Nagel, these pre-sealed assemblies reduce preparation time and help maintain uniform vial and closure quality across a batch. Clear glass permits visual checking of sample level and appearance, while the screw-neck design with bonded septum simplifies handling compared with separate cap and liner components. They are suited to methods and autosampler or storage setups that specify 20 mL N 24 format vials with a pre-mounted Red Rubber/TEF septum.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 100 pcs
- Vial volume: 20 mL
- Thread size: N 24
- Outer diameter: 27,5 mm
- Outer height: 57 mm
- EAN: 4046681136382
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Questions about Pre-sealed: 702021 + 702073
What is this article?
Pre-sealed: 702021 + 702073 is the article on this page. Luminix Health distributes Macherey-Nagel for laboratory use. It sits in Vial caps & septa, inside Vials, caps & septa, in Chromatography equipment.
A vial cap and a septum have to match the vial neck: crimp, screw or snap, and the diameter. The septum material, PTFE/silicone or rubber, decides chemical resistance and how many times a needle can pierce it. A septum that sheds into the solvent becomes ghost peaks.
An autosampler vial is the small closed bottle a chromatograph picks up. The neck is crimp, screw or snap, and the cap and the septum have to be that neck. The septum is the part the needle pierces. A soft septum reseals. A septum that is wrong for the solvent swells or sheds particles into the sample. Inserts reduce the volume when the sample is scarce. The separation they feed is described with IUPAC names and PubChem data.
Which category should I open next?
The category is Vials, caps & septa. The sub-category is Vial caps & septa. The catalogue is Chromatography equipment.
Shelves beside this one are Chromatography accessories, Autosampler vials, Crimpers & decappers and Vial inserts.
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.