Description
Screw caps N-13 with hole are black polypropylene laboratory closures designed for N-13 neck finishes on vials and sample bottles. The open-top design features a central hole that accommodates septa or enables needle penetration while the screw thread ensures a secure seal during storage, transport and analysis. Each pack contains 100 pieces, providing an economical supply for routine laboratory operations including sample preparation, chromatography and quality-control testing. With a net weight of 0,062 kg per pack, the caps remain easy to handle and store on the laboratory bench. Constructed from black PP, they deliver the chemical resistance and dimensional stability typical of polypropylene screw closures used in analytical environments. These screw caps from manufacturer Witeg fit standard N-13 threaded vessels made of glass or plastic and support workflows that require repeated access without full cap removal. They are suitable for autosampler trays, headspace applications and general laboratory sealing tasks where an open-top N-13 format is specified. Consistent sizing and robust black PP construction help laboratories maintain interchangeable, reliable closures across multiple analytical methods and sample types.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Product type: Screw caps with hole
- Cap size: N-13
- Material: Black polypropylene (PP)
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Questions about Screw caps N-13 with hole
What is this article?
Screw caps N-13 with hole 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.