Description
Screw caps in black polypropylene (PP), ND18, are plain laboratory closures supplied without borehole and without septum. Designed for ND18 neck finishes on autosampler vials and sample bottles, the solid black PP cap provides a simple screw-thread seal when a septum or magnetic function is not required. The absence of a bore and septum makes these caps suitable for temporary closure, transport, or storage steps where an intact, non-piercable lid is preferred. Each pack contains 100 pc(s) and weighs 0,142 kg, offering a convenient stock quantity for routine labware replenishment. Manufactured in polypropylene for chemical resistance typical of PP lab consumables, the black ND18 screw caps from manufacturer ROTH SELECTION integrate with standard ND18 vial systems used across analytical and general laboratory workflows. Use them wherever a clean, closed PP screw cap without opening or liner is specified for sample vessels in the autosampler-vial and sample-bottle category.
This article belongs on Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 100 pc(s)
- Product type: Screw caps without borehole
- Material: Polypropylene (PP)
- Colour: Black
- Neck finish: ND18
- Septum: Without septum
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Questions about Screw caps, PP, black, ND18, without borehole, without septum, 100 unit(s)
What is this article?
Screw caps, PP, black, ND18, without borehole, without septum, 100 unit(s) is the article on this page. Luminix Health distributes Carl Roth 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?
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.