Description
neochrom® screw caps ND18 closed are black polypropylene laboratory closures fitted with white silicone/red PTFE septa for ND18 vial systems used in analytical sample preparation. The closed-cap design supports single-injection workflows where sample integrity and controlled needle puncture are important prior to chromatographic analysis. Each septum is 1,3 mm thick and specified at 45° Shore A hardness, combining practical penetration behaviour with a chemically resistant PTFE face toward the sample. Temperature resistance from −60 °C to +200 °C covers typical refrigerated holding of prepared vials through to elevated handling conditions encountered in GC and HPLC environments. Supplied as 100 pieces per pack, these neochrom® ND18 closed screw caps from manufacturer neolab - Labor offer a convenient consumable format for routine laboratory sealing. The polypropylene housing provides a lightweight yet robust shell, while the silicone/PTFE laminate septum is intended for one-time injections. They fit standard ND18 short-thread vials and integrate into manual or autosampler protocols that rely on consistent septum quality and reliable resealing after puncture.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Cap type: Closed screw caps ND18
- Housing material: PP, black
- Septum: Silicone white/PTFE red
- Septum thickness: 1,3 mm
- EAN: 4058072037512
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Questions about neochrom® Schraubkappen ND18 geschlossen, PP, Silikon weiß/PTFE rot, 100 Stck./P
What is this article?
neochrom® Schraubkappen ND18 geschlossen, PP, Silikon weiß/PTFE rot, 100 Stck./P is the article on this page. Luminix Health distributes neolab for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Matériel de laboratoire.
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 Matériel de laboratoire.
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.
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.