Description
Pre-sealed 20 mL N 24 screw neck bottle combines a clear glass vial with a bonded N 24 polypropylene screw cap already assembled for immediate laboratory use. The bottle has an outer diameter of 27,5 mm, an outer height of 57 mm and a flat bottom, giving a stable footprint on racks and autosampler trays. It is closed with a white, closed-top N 24 PP screw cap (bonded) fitted with a silicone white / PTFE beige septum of 45° Shore A hardness and 3,2 mm thickness. The dual-layer septum offers resilient sealing with an inert PTFE sample contact surface, suitable for storage and handling of liquid samples in analytical and general laboratory work. This pre-assembled combination corresponds to bottle reference 702021 with cap 702059 and is supplied in packs of 100 pieces from manufacturer Macherey-Nagel. Pre-sealing reduces preparation time and helps maintain consistent closure quality across batches. Ideal where clear 20 mL N 24 screw neck bottles with bonded white PP caps and silicone/PTFE septa are specified for routine sample workflows.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 100 pc(s)
- Type: pre-sealed 20 mL N 24 screw neck bottle, clear, flat bottom
- Cap: N 24 PP screw cap (bonded), white, closed
- Septum: silicone white / PTFE beige
- Hardness: 45° Shore A
- EAN: 4046681085970
- Technical Information Sheet:
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Questions about Pre-sealed: 702021 + 702059
What is this article?
Pre-sealed: 702021 + 702059 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.
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.