Description
Screw caps N-24 closed with seal are closed black polypropylene (PP) closures fitted with a white styrene-butadiene gasket for secure sealing of compatible laboratory bottles and vials. The N-24 cap size matches standard screw-thread neck finishes used across analytical, preparative and storage workflows, helping maintain sample integrity during handling, transport and short-term holding. Manufactured from robust black PP, the closed design provides a solid top without an open centre, while the integrated white styrene-butadiene seal supports a reliable contact surface against the vessel rim. These caps are supplied from manufacturer Witeg in practical laboratory packs of 100 pieces, with a net weight of 0,44 kg per pack, making them convenient for routine replenishment of chromatography, sample-prep and general wet-chemistry benches. The combination of a durable polymer shell and a defined elastomer seal suits everyday closure of aqueous and many organic media where a closed N-24 format is specified. Clear sizing and consistent construction support interchangeability within existing N-24 inventories and simplify ordering for multi-user laboratories that standardise on this neck finish.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Cap size: N-24
- Material: Black polypropylene (PP)
- Seal: White styrene-butadiene
- Design: Closed
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Questions about Screw caps N-24 closed with seal
What is this article?
Screw caps N-24 closed with seal is the article on this page. Luminix Health distributes Witeg 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.
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.