Description
Screw caps N-13 closed are black polypropylene (PP) laboratory closures equipped with a butyl-PTFE-laminated seal for vessels that require the N-13 screw-cap format. The closed construction presents a solid top surface, while the laminated gasket is intended to seat evenly on the bottle or vial rim for dependable everyday sealing during sample storage, transport and bench handling. Black PP offers a durable, lightweight shell familiar in chemical and life-science laboratories, and the butyl-PTFE laminate pairs elastomeric recovery with a PTFE-facing layer suitable for many routine analytical and preparative applications. These caps come from manufacturer Witeg in packs of 100 pieces with a net weight of 0,088 kg, supporting economical replenishment of shared stocks and method-specific kits. Standardised N-13 sizing aids compatibility with matching screw-thread glassware and plasticware already in use, reducing the need for mixed closure types on the same bench. Consistent geometry, defined materials and clear pack presentation help quality-conscious laboratories maintain uniform sealing practice across sample series and multi-user environments.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Cap size: N-13
- Material: Black polypropylene (PP)
- Seal: Butyl-PTFE laminated
- Design: Closed
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about Screw caps N-13 closed
What is this article?
Screw caps N-13 closed 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.